If \[a,\ b,\ c\] are in G.P., \[a-b,\ c-a,\ b-c\]are in H.P., then \[a+4b+c\]is equal to

If \[a,\ b,\ c\] are in G.P., \[a-b,\ c-a,\ b-c\]are in H.P., then \[a

1.	If \[a,\ b,\ c\] are in G.P., \[a-b,\ c-a,\ b-c\]are in H.P., then \[a+4b+c\]is equal to
A.	0
B.	\[1\]
C.	\[-1\]
D.	None of these
Answer» B. \[1\]

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If \[a,\ b,\ c\] are in G.P., \[a-b,\ c-a,\ b-c\]are in H.P., then \[a+4b+c\]is equal to

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