Consider the following statements : Every red is blue. Every blue is green. Every green is yellow. Which of the following statements denoted by P, Q and R are correct? P. Every blue is yellow. Q. Every red is green. R. Every red is yellow. Select the answer using the code given below.

(a) P and Q only
(b) Q and R only
(c) P and R only
(d) P, Q and R ✓ UPSC's answer

Why the answer is (d)

• The statements form a chain: every red is blue, every blue is green, every green is yellow.

• P: blue → green → yellow, so every blue is yellow.

• Q: red → blue → green, so every red is green.

• R: red → blue → green → yellow, so every red is yellow. All three follow: (d).

Why the other options are wrong

(a) P and Q only: R also follows from the chain.
(b) Q and R only: P also follows from the chain.
(c) P and R only: Q also follows from the chain.

Asked in the CSAT Paper II of the UPSC Civil Services Preliminary Examination 2026, held on 24 May 2026. Question and answer key: Union Public Service Commission. Explanation: UPSC Answer Check.