(A): During an adiabatic process, an ideal gas expands by decrease in its internal energy only
(R ) : During an adiabatic process, heat cannot be exchanged between and its surroundings

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