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Which of the pairs given above are correctly matched? Anonym | www.upscguide.in

Which of the pairs given above are correctly matched?
Anonymous Quiz
14%
(a) 1 and 2 only
34%
(b) 1 and 3 only
34%
(c) 2, 3 and 4 only
19%
(d) 1, 2, 3 and 4