A load is connected to supply. A current transformer (CT), and a potential transformer (PT) is used in between load and supply. A power factor of 0.5 is measured at the secondary side of CT and PT . If phase angle error of CT and PT are $$0.4^\circ$$ and $$0.7^\circ$$, power factor of the load is

A

$$\cos 61.1^\circ$$

B

$$\cos 60.3^\circ$$

C

$$\cos 58.9^\circ$$

D

$$\cos 59.7^\circ$$