An electric dipole is placed at an angle of $$30^0c$$ with an electric field intensity $$2\times10^5\frac{N}{C}$$. It experiences a torque equal to 4Nm. The charge on the dipole, if the dipole length is 2 cm,is

A

$$2mC$$

B

$$5mC$$

C

$$7\mu\ C$$

D

$$8mC$$