Q 1406780678.     If `a, b, c` are in `AP,` then
` 1/ (sqrt b + sqrt c ) ,1/ (sqrt c + sqrt a ),1/ (sqrt a + sqrt b ) ` are
in.

A

`AP`

B

`GP`

C

`HP`

D

no definite sequence

HINT

If `a,b,c` are in AP `b-a=c-b`
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