Voting for the first phase of the Bihar Assembly elections in 121 constituencies began on Thursday. Over 3.75 crore electors will vote in the first phase, which will go on from 7 am to 6 pm. Bihar Deputy CM Samrat Choudhary, RJD leader Tejashwi Yadav and BJP's Maithili Thakur are some prominent candidates contesting in the first phase.