Use each friend's list: B plays football, cricket and hockey; C plays cricket, hockey and basketball; D plays basketball, football and hockey. Compare the three lists. Cricket is missing from D, football is missing from C, and basketball is missing from B. Only hockey appears in all three, so hockey is the game B, C and D play.
Why each option is right or wrong
(a) Wrong. B does not play basketball.
(b) Right. Hockey is the one game common to B, C and D.
(c) Wrong. D does not play cricket.
(d) Wrong. C does not play football.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
