A candidate is required to answer 6 questions out of 10 which are divided into two groups each containing 5 questions and \( \mathrm{s} / \mathrm{he} \) is not permitted to attempt more than 4 from any group. In how many different ways can \( \mathrm{S} / \) he make up her/his choice?

A 100

B 200

C 300