The correct answer is: C. Twelfth Lok Sabha
Raghuvansh Prasad Singh was a politician from Bihar, India. He was a member of the Janata Dal (United) party and served as a minister in the government of Bihar. He was also a member of the Lok Sabha,
the lower house of the Indian Parliament.He was first elected to the Lok Sabha in the 12th Lok Sabha elections in 1998. He was re-elected to the Lok Sabha in the 13th, 14th, 15th, and 16th
Lok Sabha elections. He was a member of the Lok Sabha until his death in 2020.The other options are incorrect because Raghuvansh Prasad Singh was not elected to the 10th, 11th, or 13th Lok Sabha.