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GATE | GATE-CS-2005 | Question 53

Consider the machine M: 


The language recognized by M is :


{w ∈ {a, b}* / every a in w is followed by ex­actly two b\'s}


{w ∈ {a, b}* every a in w is followed by at least two b’}


{w ∈ {a, b}* w contains the substring \'abb\'}


{w ∈ {a, b}* w does not contain \'aa\' as a substring}


Please comment below if you find anything wrong in the above post
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