JEE Math Practice Question

If $$\int {{{({x^2} + 1){e^x}} \over {{{(x + 1)}^2}}}dx = f(x){e^x} + C} $$, where C is a constant, then $${{{d^3}f} \over {d{x^3}}}$$ at x = 1 is equal to :

1. A.$$ - {3 \over 4}$$
2. B.$${3 \over 4}$$
3. C.$$ - {3 \over 2}$$
4. D.$${3 \over 2}$$