0 votes 0 votes Daniyal89 asked Sep 16, 2018 Daniyal89 310 views answer comment Share Follow See all 7 Comments See all 7 7 Comments reply arvin commented Sep 16, 2018 reply Follow Share i am not sure.. but i think it should be c 0 votes 0 votes daksirp commented Sep 16, 2018 reply Follow Share NP Class problems are in syllabus ? 0 votes 0 votes Daniyal89 commented Sep 16, 2018 reply Follow Share Can you tell how? 0 votes 0 votes Daniyal89 commented Sep 16, 2018 reply Follow Share Can you tell how? @arvin 0 votes 0 votes arvin commented Sep 17, 2018 reply Follow Share NP is closed under: union intersection concatenation Kleene star reversal It is not known whether NP is closed under complement (this question is the so-called "NP versus co-NP" question). source : wiki https://en.wikipedia.org/wiki/NP_(complexity) so option c is most appropriate... as it will need a complement also... of L2. 0 votes 0 votes Daniyal89 commented Sep 17, 2018 reply Follow Share Is NP problem are decidable problem? 0 votes 0 votes arvin commented Sep 17, 2018 reply Follow Share there is a difference between decidability and closed property.? if they were decidable they must been under p problem.... 0 votes 0 votes Please log in or register to add a comment.