The degree of the differential equation ...

The degree of the differential equation satisfying the relation
`sqrt(1+x^2) + sqrt(1+y^2) = lambda (x sqrt(1+y^2)- ysqrt(1+x^2))` is

A

(a) `2`

B

(b) `3`

C

(c) `4`

D

(d) `1`

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The correct Answer is:

D

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