If a,b,c,d in R^(+) - {1} then the minim...

If a,b,c,d `in R^(+)` - {1} then the minimum value of `log_(d)a log_(b) d + log_(a) c + log_(c ) b ` is

A

4

B

2

C

1

D

None of these

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Verified by Experts

The correct Answer is:

A

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