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The question is asking us to identify the person who did not serve as the Vice President before becoming the President of India.
Option 1: Dr. S. Radhakishan
There is no information given about whether Dr. S. Radhakishan served as the Vice President before becoming the President. Therefore, we cannot determine if this option is correct or not.
Option 2: Dr. Zakir Hussain
Similarly to option 1, there is no information given about whether Dr. Zakir Hussain served as the Vice President before becoming the President. Therefore, we cannot determine if this option is correct or not.
Option 3: Neelam Sanjeeva Reddy
The correct answer is option 3, Neelam Sanjeeva Reddy. He did not serve as the Vice President before becoming the President of India.
Option 4: R. Venkataraman
There is no information given about whether R. Venkataraman served as the Vice President before becoming the President. Therefore, we cannot determine if this option is correct or not.
In summary, based on the information provided, the correct answer is option 3, Neelam Sanjeeva Reddy. He did not serve as the Vice