Mohamad Yusuf (Indian National Congress) won the Siwan Lok Sabha seat in 1971.
The margin was 27,221 votes (8.80%%).
The voter turnout in Siwan for the 1971 Lok Sabha election was 50.60%%.
6 candidates contested from Siwan constituency in the 1971 Lok Sabha election.
Siwan is a Lok Sabha constituency in Bihar.
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