Consider the following statements:
1. Zeroth law of thermodynamics is related to temperature.
2. Entropy is related to first law of thermodynamics.
3. Internal energy of an ideal gas is a function of temperature and pressure.
4. vander Waal’s’ equation is related to an ideal gas.
Which of the above statements is/are correct?
a. 1 only b. 2, 3 and 4
c. 1 and 3 d. 2 and 4