Consider the following statements:
$A$. Zeroth law of thermodynamics gives the concept of temperature.
$B$. First law of thermodynamics gives the concept of internal energy.
$C$. In isothermal expansion of an ideal gas, $\Delta Q \neq \Delta W$.
$D$. The product of intensive and extensive variables is extensive.
$E$. The ratio of any extensive variable to mass will be an extensive variable.
Choose the correct combination of statements from the options given below:

• A
  $C, D$ and $E$ Only
• B
  $A, B$ and $C$ Only
• C
  $A, B$ and $D$ Only
• D
  $B, C$ and $D$ Only