The correct options are
B If a candidate is sentenced to prison for more than 2 years, he/she must not contest in elections for the next six years.
D A ban on the sale of liquor for 48 hours after the conclusion of elections.
Under T.N. Seshan, several measures were taken to eradicate corruption in elections. He made several recommendations to clean up India’s elections such as the enforcement of the election code of conduct, Voter IDs for all eligible voters, limit on election candidates' expenditure, and appointing election officials from states other than the one facing polls.