Study the given pattern carefully and select the number that can replace the question mark (?) in it.

​

Logic: (1st + 2nd) + 2nd = Middle number

First figure: (9 + 3) + 3 = 12 + 3 =15

Second figure: (16 + 4) + 4 =20 + 4 = 24

Third figure: (25 + 5) + 5 = 30 + 5 = 35

Thus, the correct option is (C) 35.