Question:

Given below are two statements:

Statement I: Minimum, optimum and maximum temperatures for germination of rice crop are \(10\text{-}12^{\circ}C\), \(30\text{-}32^{\circ}C\) and \(36\text{-}38^{\circ}C\), respectively.

Statement II: Minimum, optimum and maximum temperatures for germination of wheat crop are \(3\text{-}4.5^{\circ}C\), \(20\text{-}25^{\circ}C\) and \(30\text{-}40^{\circ}C\), respectively.

In the light of the above statements, choose the correct answer from the options given below

Show Hint

Compare each crop's given maximum germination temperature against the standard textbook value, that is where the difference lies.
  • Both Statement I and Statement II are correct
  • Both Statement I and Statement II are not correct
  • Statement I is correct but Statement II is not correct
  • Statement I is not correct but Statement II is correct
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The Correct Option is C

Solution and Explanation

Concept:
Every crop seed has three cardinal temperatures for germination: a minimum below which germination cannot start, an optimum at which germination is fastest and most complete, and a maximum above which germination fails again.
These values are standard figures taught in agronomy and are specific to each crop species.

Step 1: Check Statement I against known rice values.
The standard cardinal temperatures for rice germination are about \(10\text{-}12^{\circ}C\) minimum, \(30\text{-}32^{\circ}C\) optimum, and \(36\text{-}38^{\circ}C\) maximum.
Statement I reproduces exactly these accepted values for rice, so Statement I is correct.

Step 2: Check Statement II against known wheat values.
Wheat, being a cooler-season cereal than rice, germinates over a lower temperature band: about \(3\text{-}4.5^{\circ}C\) minimum and \(20\text{-}25^{\circ}C\) optimum, both of which Statement II gets right.
However, the accepted maximum germination temperature for wheat is around \(30\text{-}32^{\circ}C\), not the much wider \(30\text{-}40^{\circ}C\) that Statement II gives.

Step 3: Decide on the statements.
Because the maximum figure in Statement II is inflated well beyond the standard textbook value for wheat, Statement II counts as not correct, even though its minimum and optimum values were right.
Statement I, in contrast, matches all three accepted rice values, so it stands as correct.

Final Answer:
Statement I is correct but Statement II is not correct.
\[ \boxed{\text{Option 3}} \]
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