In this question there are two sets of figures. Figures 1, 2, 3, and 4 constitute the 'Problem Set' while figures a, b, c and d constitute the 'Answer Set'. There is a definite relationship between figures 1 and 2. Establish a similar relationship between figures 3 and 4 by selecting a suitable figure from the Answer Set that would replace the question mark (?) in figure 4.

PROBLEM FIGURE

Answer Figure