Q. Consider the following:
1. Atomic number
2. Atomic mass
3. Number of protons
4. Number of neutrons
Which among the above is / are same for each of C-12, C-13 and C-14?

• (A) 1 & 3
• (B) 2 & 4
• (C) 2 & 3
• (D) 1 & 4