AIIMS 2019 Physics Significant Figures MCQ Question

Option C is correct because the significance of zeros depends on their position relative to the decimal point and other non-zero digits. For example, in the number 0.0045, the leading zeros are not significant, while in 4500, the trailing zeros may or may not be significant depending on whether a decimal point is present (e.g., 4500. has four significant figures, but 4500 has only two unless specified). Options A and B are incorrect as they oversimplify the rules of significant figures, which include various cases beyond just the placement of zeros. Understanding these nuances is essential for accurate scientific measurement and reporting.