Two shorts dipoles $$(A, B)$$, $$A$$ having charges $$\pm 2\mu C$$ and length 1 cm and $$B$$ having charges $$\pm 4\mu C$$ and length 1 cm are placed with their centres 80 cm apart as shown in the figure. The electric field at a point $$P$$ , equi-distant from the centres of both dipoles is ____ N/ C.

A

$$ \frac{9}{16}\sqrt{2}\times10^{5} $$

B

$$ \frac{9}{16}\sqrt{2}\times10^{4} $$

C

$$ 9\sqrt{2}\times10^{4} $$

D

$$ 4.5\sqrt{2}\times10^{4} $$