19.Which one of the following gases possesses the largest internal energy

(a)  2 moles of helium occupying  1m³ at 300 K

(b)  56 kg of nitrogen at 107N/m² and 300 K

(c)   8 grams of oxygen at 8 atm and 300 K

(d)  6×10²⁶ molecules of argon occupying 40m³ at 900 K

Answer-b