In one cycle a heat engine absorb 500j from a high temperature reservoir and expels 300 j to a low temperature reservoir.if the efficiency of the engine is 60% of the efficiency of carnot engine, what is the ratio of the low temperature to the high temperature in the Carnot engine?[P-2.1, IUT : 2021-22]

A 1/3

B 1/4

C 1/5