The State Assembly Elections are being held in three phases in Assam and eight phases in West Bengal. While 30 seats will go to polls in West Bengal, 47 seats will go to polls in Assam under the first phase of polling.
source https://www.jagranjosh.com/current-affairs/state-assembly-elections-2021-first-phase-of-voting-held-west-bengal-polls-assam-polls-1616827854-1