If x = exp { tan⁻¹(y−x²/x²) }, then dy/dx equals

Options :

1. 2x [1 + tan (log x)] + x sec² (log x)

2. x [1 + tan (log x)] + sec² (log x)

3. 2x [1 + tan (logx)] + x² sec² (log x)

4. 2x [1 + tan (log x)] + sec² (log x)