From a uniform light source having luminous intensity of 300 candelas, there exists a plane surface 15 m below. The value of illuminance at a point on the plane surface where the luminous flux rays are inclined at an angle of 30 to the surface is

• A.  1.53 lux.
• B.  58.45 Kilolux.
• C.  17.32 lux.
• D.  1.15 lux.

Answer: (D)