Ace bits and bytes

Question

The complement of the language {wwwww|w in (0+1+@+#+$+%)*} is
a)Finite set b)Regular set c)CFL d)CSL but not CFL

Comments

Compliment is CSL

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Answer is given CFL

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i have seen question...in answer they said that given language is CFL..which is not possible...it must be CSL and its complement must be CSL.....

i have seen question in match the pairs...you can see that in last case....they gave like

{WWWWWWWWWWW| such that W belongs to (hindi alphabet)*}.......here they said that its CSL...

then how above language can be CFL....

it must be CSL and answer must e CSL too....