In a coil, the current changes from $$-2 \text{ A}$$ to $$+2 \text{ A}$$ in $$0.2 \text{ s}$$ and induces an emf of $$0.1 \text{ V}$$. The self inductance of the coil is :

A

$$4 \text{ mH}$$

B

$$1 \text{ mH}$$

C

$$5 \text{ mH}$$

D

$$2.5 \text{ mH}$$