What significance is attached to the final zeros in a number without any decimal point ?

Which of the following statement about significant figures is incorrect? A)All non-zero digits are significant B)The trailing zeroes in a number having a decimal point are not significant C)All zeroes between two non-zero digits are significant D)For a number less than one, zeroes on the left of the first non-zero digits are not significant

(i) Add 73.24 mL and 20.3 mL (ii) Subtract 21.2342 g foru 27.87 g Strategy: We first ensure that the quatities to be added or subtracted are expressed in the same units. We carry out the adition or subtraction. Then we follow rule 1 to express the answer to the correct number of significant figures, i.e., in the final answer, the number of right of the decimal point should be equal to the number of digits after the decimal point.

Assertion(A) Significant figures for 0.200 is 3 where as for 200 it is 1. Reason(R) Zero at the end or right of a number are significatn provided they are not on the right side of the decimal point.