(i) There are two lecturers, two singers, one doctor and one engineer in a group of six people- A, B, C, D, E & F. (ii) The doctor C is married to A who is a lecturer. (iii) The engineer is married to B who is of the same profession as that of E. (iv) C, A, B & F are married couples and nobody in the group has the same profession. (v) E is F's brother. Which of the following is a pair of lecturers?

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