The correct option is 2, which matches each person to their correct position as follows:

A. Nagender Singh was not the Chief Election Commissioner of India (1), but he served as the President of the International Court of Justice (2).

B. A. N. Ray held the position of Chief Justice of India (3), not as the Attorney General of India (4).

C. R. K. Trivedi was not the President, International Court of Justice (2), but the Chief Election Commissioner of India (1).

D. Ashok Desai served as the Attorney General of India (4), not the Chief Justice of India (3).

So, the correct combination is A-2, B-3, C-1 and D-4, which is presented in option 2. The other options incorrectly match these positions to the wrong individuals.