Explanation

All figures are equal and a combination of one small and one big figure 

All 4 figures have the same small and big combination except Figure 5, 

figure 1: one big rectangle and a small circle 

figure 2: one big circle and a small rectangle 

figure 3: one big triangle and a small circle 

figure 4:  two identical figures,.The right answer is “5” 

ND18-9-2023