UPSC Prelims 1998 · General Studies

Question 137: Logical Reasoning and Mental Ability

Which one of the following satisfies the relationship D d a : a D D :: R r b : ?

aD D A

bR R R

cb R R

dB B r

AnswerThe answer is (c).

In D d a : a D D, the third letter (a) comes first, followed by the first letter (D) written twice in capitals. Applying the same rule to R r b: the third letter b comes first, then the first letter R twice, giving b R R.

Why each option is right or wrong

(a) D D A does not follow the rule; it uses the wrong letters.
(b) R R R does not move the third letter to the front.
(c) Right: the third letter first, then the first letter twice: b R R.
(d) B B r does not follow the rule.

Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 1998, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.