1.

If \[a,\ b,\ c\] are in G.P. and \[\log a-\log 2b,\ \log 2b-\log 3c\]and \[\log 3c-\log a\] are in A.P., then \[a,\ b,\ c\] are the length of the sides of a triangle which is

A. Acute angled
B. Obtuse angled
C. Right angled
D. Equilateral
Answer» C. Right angled


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