If the length of sub-normal is equal to ...

If the length of sub-normal is equal to the length of sub-tangent at any point (3, 4) on the curve y = f(x) and the tangent at (3, 4) to y = f(x) meets the coordinate axes at A and B, then the maximum area of the triangle OAB, where O is origin, is

A

(a) `45//2`

B

(b) `49//2`

C

(c) `25//2`

D

(d) `81//2`

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The correct Answer is:

B

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