A catalyst has total surface area of 103 cm2 and adsorption sites available on it are 6×1015 sites/ cm2 . H2 gas is adsorbed on this surface occupying only 5% of the available sites of total surface area. On heating catalyst releases H2 back and whole of the H2 adsorbed is measured to occupy 2.46 mL at 0.03 atm and 300 K. The no. of H2 molecules adsorbed on each site is equal to:
a. 6
b. 2
c. 3
d. 4