An external pressure P is applied on a cube at $0^{\circ}C$ so that it is equally compressed from all sides. K is the bulk modulus of the material of the cube and α is its coefficient of linear expansion. Suppose we want to bring the cube to its original size by heating. The temperature should be raised by :

Question

$\begin{array}{1 1}(1) \large\frac{P}{3 \alpha K} \\(2) \large\frac{P}{ \alpha K} \\(3) \large\frac{3 \alpha}{P K} \\(4) 3 PK \alpha \end{array}$