A. A few farmers are rocket scientists. Some rocket scientists catch snakes. A few farmers catch snakes.

B. Poonam is a kangaroo. Some kangaroos are made of teak. Poonam is made of teak.

C. No bulls eat grass. All matadors eat grass. No matadors are bulls.

D. Some skunks drive Cadillacs. All skunks are polar bears. Some polar bears drive Cadillacs.

A) The few farmers who are rocket scientists need not be the rocket scientists that catch snakes. Hence, A is wrong.

B) Poonam need not be one of those Kangaroos that are made of teak. Hence, B is wrong.

C) No bull eats grass and all matadors eat grass. We can infer that bulls and matadors are distinct sets. Hence, C is correct.

D) Bears that are Cadillacs will also be polar bears. Hence, some polar bears are Cadillacs is true. So, D is correct.