What happens when methane undergoes combustion in system A and B respectively?$\underset{\mathrm{System} \mathrm{A}}{\boxed{\mathrm{Adiabatic} \mathrm{system}}} \underset{\mathrm{System} \mathrm{B}}{\boxed{\mathrm{Diathermic} \mathrm{container}}}$

	System A	System B
1.	Temperature falls	Temperature rises
2.	Temperature rises	Temperature remains same
3.	Temperature remains same	Temperature rises
4.	Temperature falls	Temperature remains same