Efficiency of a Carnot heat engine may be given as

Options

A. `(w)/(Q_(2))`
B. `1-(Q_(2))/(Q_(1))`
C. `1-(T_(1))/(T_(2))`
D. None of these

Explanation

To determine the efficiency of a Carnot heat engine, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Efficiency**: The efficiency (η) of a heat engine is defined as the ratio of the work done (W) by the engine to the heat supplied (Q1) to the engine. Mathematically, it is expressed as:
\[ \eta = \frac{W}{Q_1} \]
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