Two point charges `q_1=2 µc` and `q_2=1 µc` are placed at distance b = 1cm and a = 2 cm from the origin on the y and x axes as shown in figure. The electric field vector at point P (a, b) will subtend an angle `theta` with the X - axis given by,
Options:
(a) `tanθ= 4`
(b) `tanθ =1`
(c) `tanθ= 3 `
(d) `tanθ= 2`