Explanation:

Sri Aurobindo Ghosh was initially a prominent militant nationalist, advocating for armed revolution against British rule. However, after his acquittal in the Alipore Bomb Case in 1910, he retired from politics and moved to Pondicherry, dedicating his life to spiritual and philosophical pursuits, becoming a renowned yogi and spiritual leader. Subramanyan Bharati was a revolutionary poet and journalist, not primarily a spiritualist. Swami Vivekananda was a spiritual leader from the outset, not a militant nationalist. Vinoba Bhave was a spiritual successor of Mahatma Gandhi and a social reformer, not a militant nationalist.