What number should replace the question mark? 2, 16, 4, 14, 6, 12, ---?  Choose the correct option.
A) 8	B) 10	C) 12	D) 14	E) 16

Rationale: answer : a 2 , 16 , 4 , 14 , 6 , 12 , 8 ? there are two alternate sequences : + 2 and - 2 .
Answer: A