Option 1: The option a-c-d-a suggests that Dr. Zakir Hussain was succeeded by Fakhruddin Ali Ahmed, who was then succeeded by Dr. Zakir Hussain again. This order is not correct as a president cannot serve two non-consecutive terms.

Option 2: The option c-b-d-a suggests that Fakhruddin Ali Ahmed was succeeded by Dr. S. Radhakrishnan, who was then succeeded by V.V. Giri, and finally by Dr. Zakir Hussain. This order is not correct as V.V. Giri served as President after Dr. Zakir Hussain.

Option 3: The option d-a-b-c suggests that V.V. Giri was succeeded by Dr. Zakir Hussain, who was then succeeded by Dr. S. Radhakrishnan, and finally by Fakhruddin Ali Ahmed. This order is incorrect as Fakhruddin Ali Ahmed served as President after Dr. S. Radhakrishnan.

Option 4: The option b-a-d-c suggests that Dr. S. Radhakrishnan was succeeded by Dr. Zakir Hussain, who was then succeeded by V.V. Giri, and finally