If the positive integers a, b, c, d are in AP, then the numbers abc, abd, acd, bcd are in

If the positive integers a, b, c, d are in AP, then the numbers abc, a

1.	If the positive integers a, b, c, d are in AP, then the numbers abc, abd, acd, bcd are in
A.	HP
B.	AP
C.	GP
D.	None of the above
Answer» B. AP

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If the positive integers a, b, c, d are in AP, then the numbers abc, abd, acd, bcd are in

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