If a^x=b^y=c^z=d^w then loga(bcd)=...

If `a^x=b^y=c^z=d^w` then `log_a(bcd)=`

A

`(1)/(x) ((1)/(y) + (1)/(z) + (1)/(w))`

B

`x((1)/(y) + (1)/(z) + (1)/(w))`

C

`(y + z + w)/(x)`

D

none of these

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The correct Answer is:

B

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