The `Individual Satyagraha` was a form of non-violent resistance introduced by Mahatma Gandhi in his freedom struggle against British rule. The question asks about the second person to participate in this individual movement. The options provided are four influential Indian personalities.

Option 1, Dr. Rajendra Prasad, was the first President of India but not the second Individual Satyagrahi.

Option 2, Pandit Jawaharlal Nehru, was the first Prime Minister of India and indeed the second Individual Satyagrahi following Vinoba Bhave, making this the correct answer.

Option 3, C. Rajagopalachari, was the last Governor-General of India, but he was not the second Satyagrahi in the `Individual Satyagraha` movement.

Option 4, Sardar Vallabhbhai Patel, also known as the "Iron Man of India", was involved in the freedom struggle. However, he wasn`t the second Individual Satyagrahi.

So, the correct answer is Pandit Jawaharlal Nehru.