Assertion (A) : Equal moles of different substances contain same number of constituent particles. Reason (R) : Equal weights of different substances contain the same number of constituent particles. The correct answer is

• A

  Both $(\mathrm{A})$ and $(\mathrm{R})$ are true and $(\mathrm{R})$ is the correct explanation of (A)
• B

  Both $(A)$ and $(R)$ are true but $(R)$ is not the correct explanation of (A)
• Correct answer
  C

  (A) is true, but (R) is false
• D

  (A) is false but (R) is true

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