If ab gt -1, bc gt -1 and ca gt -1, then...

If `ab gt -1, bc gt -1 and ca gt -1`, then the value of `cot^(-1) ((ab+1)/(a-b) ) + cot^(-1) ((bc+1)/(b-c) ) + cot^(-1) ((ca+1)/( c-a))` is a)`-1` b)`cot^(-1) "" (a+b+c)` c)`cot^(-1) ("abc")` d)0

A

`-1`

B

`cot^(-1) "" (a+b+c)`

C

`cot^(-1) ("abc")`

D

0

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The correct Answer is:

D

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