Two opposite and equal charges 4 × 10^–8 coulomb when placed 2 × 10^–2 cm away, from a dipole. If this dipole is placed in an external electric field 4 × 10⁸ newton/coulomb, the value of maximum torque and the work done in rotating it through 180^o will be

• A

  64 × 10^–4Nm and 64 × 10^–4J

• B

  32 × 10^–4Nm and 32 × 10^–4J

• C

  64 × 10^–4Nm and 32 × 10^–4J

• D

  32 × 10^–4Nm and 64 × 10^–4J