If `A = {x : x \in \mathbb{Z}` and `0 \lt x \lt 4}` and `B = {x : x \in \mathbb{Z}` and `3 \le x \le 6}`, then `A \cap B` =-?-
(a) `{2}`, (b) `{3}`, (c) `3`, (d) `\phi`