This question can easily be solved with the help of elimination technique.
From the question we have:
1. 1>r>t
2. rt=1 (From this we can also conclude that either both are positive or both are negative and none can be 0)
(A) INCORRECT as r is positive and t is negative whereas both need to be of the same sign.
(C) INCORRECT because r>t and not vice versa.
(D) INCORRECT because t<r and r <1 thus t <1.
(E) INCORRECT because r <1.
Hence (B) is the correct answer.
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