The correct answer is: C. Mian Jawahar Singh.
Mian Jawahar Singh was the leader of the Ghadar Party. He was born in 1870 in the village of Chakwal in Punjab, British India. He was educated at the Government College in Lahore and then at the University of Punjab. After graduating, he worked as a teacher in Lahore.
In 1905, Singh joined the Ghadar Party, which was a revolutionary organization that was formed to overthrow British rule in India. He quickly became one of the leaders of the party and played a key role in planning and carrying out the Ghadar Rebellion of 1915.
The Ghadar Rebellion was a failed attempt to overthrow British rule in India. It was launched on February 21, 1915, when a group of Ghadar Party members attacked the British Indian Army cantonment at Singapore. The rebellion was quickly suppressed, but it had a significant impact on the Indian independence movement.
After the failure of the Ghadar Rebellion, Singh fled to the United States. He continued to work for Indian independence from the United States and died in 1931.
Hardev, Bhai Hirdey Ram, and Jawahar Naryal were all members of the Ghadar Party, but they were not the leaders of the party.