In this question, we are given a set of figures and we need to determine which group of figures fit into the same class.

Option 1 states that only figures 1 and 2 fit into the same class. Option 2 states that only figures 2 and 3 fit into the same class. Option 3 states that figures 1, 2, and 3 all fit into the same class. Option 4 states that only figure 3 fits into the same class.

Since the correct answer is option 4, this means that only figure 3 fits into the same class. This implies that figures 1 and 2 do not share the same properties or characteristics as figure 3.

Therefore, the correct group of figures that fit into the same class is only figure 3.

Note: The provided answer is generally correct, but without any further information or context about the figures, it is difficult to determine the exact reasoning behind the classification.