question_answer

Select a number from the options which will replace the question mark, if a certain rule is followed in the figures.

(i)
4	7
9	12

                                                                       

(ii)
8	16
15	23

                                                                       

(iii)
?	18
19	15

                                                                       

A)  22                               

B)  20                   

C)         18                   

D)         15