He has always gone ____ strange hobbies like collecting bottle-tops and inventing secret codes.
A. into
B. in for
C. through

Note: Is the answer B? If so, is such an expression often used?

Question

He has always gone ____ strange hobbies like collecting bottle-tops and inventing secret codes.
A.	into
B.	in for
C.	through

Note: Is the answer B? If so, is such an expression often used?

Answer

Yes, it's B. "He has always gone in for strange hobbies like collecting bottle-tops and inventing secret codes."

We definitely use and understand it commonly. It means something like "actively prefer". Search for the phrase in quotes and you'll find plenty of examples.