The efficiency of a Carnot engine operating with reservoir temperature of $100\,^{\circ} C$ and $-23\,^{\circ} C$ will be
  • A$\frac{373+250}{373}$
  • B$\frac{100+23}{100}$
  • C$\frac{373-250}{373}$
  • D$\frac{100-23}{100}$
AIPMT 1997, Easy
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