Correct Answer: C
Explanation:
In fig. (X), one of the dots lies in the square alone, another dot lies in the region common to the square and the triangle only and the third dot lies in the region common to the circle and the triangle. In fig. (1), there is no region which lies in the square alone. In each of the figures (2) and (4), there is no region common to the circle and the triangle only. Only, fig. (3) consists of all the three types of regions.