(A): The carnot cycle is useful in understanding the performance of heat engines.
(R ): The Carnot cycle provides a ways of determining the maximum possible efficiency achievable with reservoirs of given temperatures. (2006)

Options

A. Both (A) and(R ) are true and (R ) is the correct explanation of (A)
B. Both (A) and (R ) are (R ) true and is not the correct explanation of (A)
C. (A) is true but (R ) is false
D. Both (A) and (R ) are false

Answer

A