If the curves y^2=6x, 9x^2+by^2=16 inter...

If the curves `y^2=6x`, `9x^2+by^2=16` intersect each other at right angles then the value of b is: (1) 6 (2) `7/2` (3) `4` (4) `9/2`

A

`7/2`

B

4

C

`9/2`

D

6

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The correct Answer is:

C

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