Two moles of ideal helium gas are in a rubber balloon at $$30^\circ C$$ .The balloon is fully expandable and can be assumed to require no energy in its expansion. The temperature of the gas in the balloon is slowly changed to $$35^\circ C$$.The amount of heat required in raising the temperature is nearly (take R = 8.31 J/mol.K)

A

62 J

B

104 J

C

124 J

D

208 J