JEE Math Practice Question

If $$y{{dy} \over {dx}} = x\left[ {{{{y^2}} \over {{x^2}}} + {{\phi \left( {{{{y^2}} \over {{x^2}}}} \right)} \over {\phi '\left( {{{{y^2}} \over {{x^2}}}} \right)}}} \right]$$, x > 0, $$\phi$$ > 0, and y(1) = $$-$$1, then $$\phi \left( {{{{y^2}} \over 4}} \right)$$ is equal to :

1. A.4 $$\phi$$ (2)
2. B.4$$\phi$$ (1)
3. C.2 $$\phi$$ (1)
4. D.$$\phi$$ (1)