Out of 100 Kcal/second of Incident Radiant Energy on the Surface

Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be

A) 0.35
B) 0.45
C) 0.55
D) 0.85