A series is given, with one term missing. Choose the correct alternative from the given one that will complete the series.
68, 72, 65, 69, 62, 66, ?
59
61
68
75
A.
68 + 4 = 7272 - 7 = 6565 + 4 = 6969 - 7 = 6262 + 4 = 6666 - 7 = 59