1 votes 1 votes closed as a duplicate of: Theory of Computation Closure Properties Please give correct/verified answer. learner_geek asked Aug 7, 2017 • closed Aug 8, 2017 by learner_geek learner_geek 800 views comment Share Follow See all 3 Comments See all 3 3 Comments reply joshi_nitish commented Aug 7, 2017 reply Follow Share 1-true 2-true 3- dont know...CSL in not in syllabus. 1 votes 1 votes learner_geek commented Aug 7, 2017 reply Follow Share Thanks @ joshi_nitish 0 votes 0 votes rosshan77 commented Jul 31, 2018 reply Follow Share csl is closed to kleen star and plus, differenced 1 votes 1 votes Please log in or register to add a comment.