Directions: Read the Assertion (A) and the Reason (R) and choose the correct option.Assertion (A):Plants respire only at night.Reason (R):Photosynthesis takes place only in the presence of light.
Answer (Detailed Solution Below)View answer ▾Hide ▴
Answer: Option D — A is false, but R is true
Detailed Solution
Plants respire all the time, day and night; at night respiration is simply not masked by photosynthesis. So A is false.
Photosynthesis needs light energy, so R is true.
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Ask a doubtMore Assertion & Reasoning Questions
View all ›- Q1.Directions: Read the Assertion (A) and the Reason (R) and choose the correct option.
- Q2.Directions: Read the Assertion (A) and the Reason (R) and choose the correct option.
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Assertion & Reasoning — Preparation
This question tests your understanding of Assertion & Reasoning, a key topic in the Logical Reasoning section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.
Assertion and reason questions give two statements: an assertion (A) and a reason (R). You must decide whether each statement is true or false and, if both are true, whether R correctly explains A. The standard options are: both A and R are true and R is the correct explanation of A; both are true but R is not the correct explanation; A is true but R is false; and A is false but R is true. Work in two steps. First, check each statement independently for truth. Second, if both are true, test the link by putting "because" between them: "A because R". If that sentence makes logical sense and R actually explains why A is true, R is the correct explanation. Many students lose marks by choosing the first option whenever both statements are true, so always check the link separately. Practise the assertion and reason questions below. Each solution checks both statements and the link between them.