The list includes names: a. Chanakya, b. Vishnugupta, d. Kautilya - These are all names for the same historical figure, the advisor to Chandragupta Maurya and author of Arthashastra. c. Ramgupta - A different historical figure, a ruler of the Gupta dynasty. e. Vishnu Sharma - A different historical figure, traditionally credited as the author of the Panchatantra fables. f. Pakshin Swami - A different name, possibly related to a commentator or a philosopher, distinct from the others. The question asks to pick the 'odd persons'. The 'odd persons' are those who are distinct individuals from Chanakya/Vishnugupta/Kautilya. These are Ramgupta (c), Vishnu Sharma (e), and Pakshin Swami (f). Option D lists only c and e, which are two of the three distinct individuals. Since it asks to "pick out" the odd persons and provides options listing subsets, D is the only option that exclusively lists persons who are not Chanakya/Vishnugupta/Kautilya.