An Ideal Carnot Heat Engine Operates Between $285 \mathrm {~K}$ And $460 \mathrm {~K}$

Multiple Choice

An ideal Carnot heat engine operates between $285 \mathrm {~K}$ and $460 \mathrm {~K}$ . What is its efficiency?

A) $0.62$
B) $1.61$
C) $0.38$
D) $0.61$