Select the number that can replace the question mark (?) in the following series.

18, 31, 44, 57, 70, ?

Logic: Each number increases by 13 in the sequence.

18 + 13 = 31

31 + 13 = 44

44 + 13 = 57

57 + 13 = 70

70 + 13 = 83

Thus, the correct option is (a)