Correct Answer: C
Explanation:
In fig. (X), one of the dots lies in the region common to the square and the triangle and another dot lies in the region common to the circle and the triangle. In each of the alternatives (1), (2) and (4), the region common to the square and the triangle lies within the circle. Therefore, in each of these figures, there is no region common to the square and the triangle only. Only the alternative (3) consists of a region common to the square and the triangle only and another region common to the circle and the triangle only. Hence, fig. (3) is the answer.