Assertion (A): The significant figure for 0.200 is 3, whereas the significant figure for 200 is 1.
Reason (R): Zero at the end or right of a number is significant, provided it is not on the right side of the decimal point.

      

1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.

Hint: Significant figures are all numbers that add to the meaning of the overall value of the number. 
0.200 contains 3 while 200 contains only one significant figure because zero at the end or right of a number are significant provided they are on the right side of the decimal point.
Thus, The assertion is true but the reason is false