Pick up the correct option to replace the question mark (?). 12, 11, 1 – McqOptions

MCQOPTIONS

1.	Pick up the correct option to replace the question mark (?). 12, 11, 13, 31, ?, 61.
A.	38
B.	18
C.	16
D.	15
E.	None of these
Answer» D. 15

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