Consider the following. Statement-I $\quad$ : Both internal energy (U) and work (w) are state functions. Statement-II : During the free expansion of an ideal gas into vacuum, the work done is zero. The correct answer is

• A

  Both statement-I and statement-II are correct
• B

  Both statement-I and statement-II are not correct
• C

  Statement-I is correct, but statement-II is not correct
• Correct answer
  D

  Statement-I is not correct, but statement-II is correct

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