Vishnu, Poorna, Vishal, Rajni, and Rama are sitting in a

Solution

 Poorna is third to the extreme right end. Vishnu is second to the left of Poorna. This implies that Vishnu sits at extreme left end.  Vishal is to the right of Poorna. Rajni is third to the right of Rama, who is the immediate neighbor of Vishnu. This means Rajni sits at the extreme right end, and Rama sits between Vishnu and Poorna.  Final arrangement is shown below: From the above arrangement, it is clear that Poorna is sitting at the center. Hence, the correct answer is (A).