Consider an exothermic reaction:
$2 \mathrm{~A}(\mathrm{~s}) \longrightarrow \mathrm{B}(\mathrm{s})+\mathrm{C}(\mathrm{g})+\mathrm{D}(\mathrm{g})$
The correct statement about the reaction is

• A

  spontaneous only at very low temperatures.
• Correct answer
  B

  spontaneous at all temperatures.
• C

  non-spontaneous at all temperatures.
• D

  spontaneous only at very high temperatures.

Hence, the correct answer is option: 'B'.