0 votes 0 votes KISHALAY DAS asked Nov 5, 2016 KISHALAY DAS 204 views answer comment Share Follow See 1 comment See all 1 1 comment reply Sushant Gokhale commented Nov 25, 2016 reply Follow Share Assuming option D is $\supseteq$ operation, D is right answer. 0 votes 0 votes Please log in or register to add a comment.