A 200 V lamp takes a current of 1 A, it produces a total flux of 2,860 lumens. The efficiency of the lamp is

A

9.9 $$\frac{Lumens}{W}$$

B

8.9 $$\frac{Lumens}{W}$$

C

10.9 $$\frac{Lumens}{W}$$

D

14.3 $$\frac{Lumens}{W}$$