Question

Match the LIST-I with LIST-II 
Average composition of Milk 

LIST-I		LIST-II
(Constituents)		(Percentage %)
A.	Water	I.	87
B.	Protein	II.	3.3
C.	Lactose	III.	5.0
D.	Total solids	IV.	12.9

Choose the most appropriate answer from the options given below:

• A. A - II, B - I, C - IV, D - III
• B. A - I, B - III, C - II, D - IV
• C. A - III, B - I, C - IV, D - II
• D. A - III, B - IV, C - I, D - II

Hint:

Remember the hierarchy of milk components by percentage: Water (>>80%)>Total Solids (~13%)>Lactose (~5%)>Fat (~4%)>Protein (~3.3%)>Minerals (\textless1%).

Answer 1

The Correct Option is D

Step 1: Recall the typical composition of cow's milk. Milk is an emulsion of fat in an aqueous solution containing proteins, lactose, and minerals.
Step 2: Match each constituent with its approximate percentage.

A. Water: Milk is mostly water. The typical percentage is around 87%. So, A matches III.
B. Protein: The protein content of milk is relatively low, typically around 3.3%. So, B matches IV.
C. Lactose: Lactose is the sugar in milk, with a typical percentage of about 4.8% to 5.0%. So, C matches I.
D. Total solids: This is everything that is not water (fat, protein, lactose, minerals). The typical value is around 12-13%. So, D matches II. \end{itemize}
Step 3: Combine the matches and select the correct option. The correct matching is A - III, B - IV, C - I, D - II. This corresponds to option (4).