A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
19, 11, 13, 16, 15, 17, 13, 19, 21, ?
10
11
12
15
A.
10
19, 11, 13, 16, 15, 17, 13, 19, 21, ?
(19, 16, 13, ?) (11, 13, 15, 17, 19, 21)
