The set of all strings over ∑ = {a,b} in which strings consisting a’s and b’s and ending with in bb is?

The set of all strings over ∑ = {a,b} in which strings consisting a

1.	The set of all strings over ∑ = {a,b} in which strings consisting a’s and b’s and ending with in bb is?
A.	abb) a*bbbc) (a+
B.	a*bbb
C.	(a+b)* bb
D.	All of the mentioned
Answer» D. All of the mentioned