The set of all strings over ? = {a,b} in which all strings having bbbb – McqOptions

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1.	The set of all strings over ? = {a,b} in which all strings having bbbb as substring is
A.	(a+
B.	* bbbb (a+b)b) (a+b) bb (a+b)*bb
C.	bbb(a+b)*
D.	bb (a+b)*
Answer» B. * bbbb (a+b)b) (a+b) bb (a+b)*bb

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