A thermally insulated vessel contains an ideal gas of molecular mass M and ratio of specific heats $\gamma$. It is moving with speed $v$ and is suddenly brought to rest. Assuming no heat is lost to the surroundings, its temperature increases by :

Question

( A ) $\frac{(\gamma -1)}{2 \gamma R} Mv^2K$
( B ) $\frac{\gamma Mv^2}{2R} K$
( C ) $\frac{(\gamma -1)}{2 ( \gamma + 1) R} Mv^2K$
( D ) $\frac{(\gamma -1)}{2R} Mv^2K$