JEE Math Practice Question

For natural numbers $$m$$ , $$n$$, if $${\left( {1 - y} \right)^m}{\left( {1 + y} \right)^n}\,\, = 1 + {a_1}y + {a_2}{y^2} + ..........$$ and $${a_1} = {a_2} = 10,$$ then $$\left( {m,\,n} \right)$$ is

1. A.$$\left( {20,\,45} \right)$$
2. B.$$\left( {35,\,20} \right)$$
3. C.$$\left( {45,\,35} \right)$$
4. D.$$\left( {35,\,45} \right)$$