Seales comes back, to bowl the final over of the session. The first ball is a loosener -- short and wide as Sudharsan punishes it, with a fierce square cut past point for a four.
India dominated the second session to go into the tea break on 220/1 in 58 overs.
The two 23-year-old left-handers put on an unbroken stand of 162 runs to put India on course for a huge first innings total.
West Indies' bowlers struggled as they conceded 126 runs in 30 overs in the session.
Jaiswal completed his seventh Test century, to be unbeaten on 111 from 162 balls, while Sudharsan got back among the runs with a composed knock of 71 not out.