A piece of hot copper at $100^{\circ} \mathrm{C}$ is plunged into a pond at $30^{\circ} \mathrm{C}$. The copper cools down to $30^{\circ} \mathrm{C}$, while the pond, being huge, stays at its initial temperature. Then-

• A

  copper loses some entropy, the pond stays at the same entropy
• B

  copper loses some entropy, and the pond gains exactly the same amount of entropy
• Correct answer
  C

  copper loses entropy, and the pond gains more than this amount of entropy
• D

  both copper and the pond gain in entropy

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