To find Mohan's play day, we need to place the six activities, Physics, Chemistry, Mathematics, Biology, Social Science and Play, across Monday to Saturday using the given clues, then check each option:
Only placing Play on Tuesday allows every clue, the Physics-Play-Social Science block, the Chemistry-Biology block, the two-day gap and Mathematics's placement, to hold together consistently.
Therefore, the correct answer is Tuesday.
Instead of testing each day one at a time, we can build Mohan's entire week directly from the clues and then simply read off the play day. Let's check each option once the full schedule is known:
Building out the full week from the clues fixes Physics on Monday and the play day right after it, on Tuesday, with every other subject falling neatly into place around that.
Therefore, the correct answer is Tuesday.
Using the schedule derived from the clues, Physics falls on Monday and Biology falls on Saturday. We need the number of days that lie between these two, and can check each option:
Since Physics is on Monday and Biology is on Saturday, the four days of Tuesday, Wednesday, Thursday and Friday lie between them.
Therefore, the correct answer is Four.
Assign each reading day a number, Monday=1, Tuesday=2, Wednesday=3, Thursday=4, Friday=5, Saturday=6, since Sunday is a holiday and not part of the reading week. Physics sits at position 1 and Biology sits at position 6. Let's check each option using this numbering:
Counting from position 1 to position 6 covers 5 steps in total, but the number of days strictly lying between them, excluding both endpoints, is one less than that, four days.
Therefore, the correct answer is Four.
Social Science's position is fixed by its relationship to the play day (clue viii) and its distance from Biology day (clue vii). Let's check each option against the full schedule derived from all the clues:
Only the Wednesday placement keeps every clue, the Physics-Play-Social Science sequence, the Chemistry-Biology sequence, the two-day Biology gap and the Mathematics restriction, consistent at once.
Therefore, the correct answer is Wednesday.
Clue (viii) directly ties Social Science day to the day right after the play day, so once we know the play day, Social Science follows immediately. Let's confirm this against each option:
Since Physics day and the play day are fixed on Monday and Tuesday respectively, applying clue (viii) directly places Social Science on Wednesday, the day right after the play day.
Therefore, the correct answer is Wednesday.
Mathematics day is constrained by clue (iv): it cannot be the first or last reading day, and it must fall before Chemistry day. Let's test each option:
Every other day is already claimed by another subject or activity once the full schedule is worked out, leaving only Thursday free for Mathematics.
Therefore, the correct answer is Thursday.
Since Mohan's week has exactly six reading-related activities, Physics, Play, Social Science, Chemistry, Biology and Mathematics, spread over six days, Mathematics day must be whichever single day is left once the other five are placed. Let's check each option:
With five of the six days already committed to the other five activities, Thursday is the single remaining day, and it happens to satisfy every restriction placed on Mathematics day as well.
Therefore, the correct answer is Thursday.
Using the full weekly schedule, Monday: Physics, Tuesday: Play, Wednesday: Social Science, Thursday: Mathematics, Friday: Chemistry, Saturday: Biology, we can check each statement:
Only the first statement, that Biology day comes after Chemistry day, holds up against the schedule.
Therefore, the correct answer is Biology day is after Chemistry day.
Instead of relying on the full calendar, we can check each statement directly against the clue it corresponds to:
Only the first statement lines up directly with a clue, clue (v) itself confirms Biology day comes immediately after Chemistry day.
Therefore, the correct answer is Biology day is after Chemistry day.