The respective number of significant figures for the numbers 23.023, 0.0003 and `2.1xx10^(-3)` are

Options

A. 4 , 4, 2
B. 5, 1, 2
C. 5, 1, 5
D. 5, 5, 2

Answer

b

Explanation

For 23.023, no. of significant figures = 5
For 0.0003, no. of significant figures = 1
For `2.1xx10^(-3)`, no. of significant figures = 2
[The power of 10 is not considered while calculating the number of significant figures.]