If a, b, c are in AP then relation between a, b, c can be _________

1.	If a, b, c are in AP then relation between a, b, c can be _________
A.	2b = 2a + 3c
B.	2a = b + c
C.	2b = a + c
D.	2c = a + c
Answer» D. 2c = a + c

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