Problem

Number of ways in which 12 different things can be distributed in 5 sets of 2, 2, 2, 3, 3 things is a.

\frac{12!}{12!}

\frac{12!5!}{(2!)^5}

\frac{12!}{12!5!}

\frac{12!5!}{(3!)^2 (2!)^3}