Which of the following salts is not formed when $CuSO_4.5H_2O$ is heated ?

Question

$\begin {array} {1 1} (A)\;CuSO_4.3H_2O & \quad (B)\;CuSO_4.2H_2O \\ (C)\;CuSO_4.H_2O & \quad (D)\;CuSO_4 \end {array}$