Select the option that is related to the third number in the same way as the second number is related to first number and the sixth number is related to the fifth number. 35 : 4 :: 39 : ?

. 35 = 7 × 5    ↓                                                                                                        (Subtracting the factor of 35)    7 – 5 = 2 ⇒ 2 × 2 = 4                                                      (Subtracted value multiplied by 2) Similarly, 39 = 13 × 3 ↓                                                                                           (Subtracting the factor of 39) 13 – 3 = 10 ⇒ 10 × 2 = 20                                                (Subtracted value multiplied by 2) Hence, option D is correct.