How to Solve Assertion and Reason Questions (A & R)

Every A&R question gives you two statements:

1. Assertion (A): A factual statement or a claim.
2. Reason (R): An explanation or cause for a statement.

Your job is to determine two things:

• Are the statements individually true or false?
• If both are true, does the Reason correctly explain why the Assertion is happening?

Almost all A&R questions have these exact 4 options. You must memorize them:

• Option A: Both A and R are true, and R is the correct explanation of A.
• Option B: Both A and R are true, but R is NOT the correct explanation of A.
• Option C: A is true, but R is false.
• Option D: A is false, but R is true.

(Note: Some exams have a 5th option 'Both are false', but the standard CBSE format mostly uses these four).

Follow this 3-step strategy:

Step 1: Check the Assertion (A). Read it like a normal True/False question. Is it scientifically/factually true?

• If False, your answer is immediately Option D.

Step 2: Check the Reason (R). Read it completely independently. Is this statement factually true on its own?

• If False, your answer is immediately Option C.

Step 3: The 'Because' Link. If BOTH statements are true, you must choose between Option A and B. Read the Assertion, add the word "BECAUSE", and then read the Reason.

• Does it make a perfectly logical sentence? If yes, the answer is Option A.
• If they sound like two completely unrelated true facts, the answer is Option B.

Assertion (A): The sun appears red during sunset. Reason (R): Red light scatters the least by atmospheric particles.

Step 1: Is A true? Yes, the sun does look red. Step 2: Is R true? Yes, red has the longest wavelength and scatters the least. Step 3: Read them together: "The sun appears red during sunset BECAUSE red light scatters the least." Does this make logical sense? Yes! The least scattered light reaches our eyes. Answer: Option A.