If the 3rd, 4th and 5th terms of (x+a)^n...

If the 3rd, 4th and 5th terms of `(x+a)^n` are 720, 1080 and 810 respectively then `(x,a,n)=`

A

`(2,3,5)`

B

`(3,5,7)`

C

`(5,3,7)`

D

`(2,5,3)`

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The correct Answer is:

A

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