All the elections where a candidate by the name Purna Narayan Sinha contested in whether lost or won, by how many votes. His/ her vote share etc details all can be found here.
LOST against Moni Kumar Subbawith 1% vote share
LOST against Swarup Upadhayayawith 23% vote share
LOST against Bipin Pal Daswith 29% vote share