1, 4, 9, 16, 20, 36, 49

Question:
1, 4, 9, 16, 20, 36, 49

[A].

1

[B].

9

[C].

20

[D].

49

Answer: Option C

Explanation:

The pattern is 12, 22, 32, 42, 52, 62, 72. But, instead of 52, it is 20 which to be turned out.