Five persons A, B, C, D and E are sitting in a row facing towards north (not necessarily in the same order). Each of them are preparing for different competitive exam C1, C2, C3, C4 and C5 (not necessarily in the same order). No two persons are preparing for same exam. Only two persons sit between A and the one who is preparing for C3. D sits to the immediate right of B and B is preparing for C5. Only one person sits between D and E. One among D and E sits at one of the extreme end. A is not the neighbour of B. One person sits between the persons who are preparing for C3 and C1. The one preparing for C1 sits to the immediate left of the one who is preparing for C5. C is not preparing for C4. Who is preparing for C2?

​Five persons A, B, C, D and E are sitting in a row facing towards north.

Thus, the correct option is (a) C.