Chemistry · Some Basic Concepts of Chemistry

Consider the following statements regarding significant figures:\n(A) All non-zero digits are significant.\n(B) Zeros between two non-zero digits are not significant.\n(C) Zeros to the left of the first non-zero digit are significant.\n(D) Exponential notation \( N \times 10^n \) has \( N \) representing significant digits. \nWhich of the above statements are correct?

1. and (C) only
2. (B) and (C) only
3. (A), (B) and (D) only
4. and (D) only