Which of the following is wrong

Options

A. `22.2 + 2.22 + 0.222`, reported sum is `24.6`
B. `4.53 + 2.3 + 6.24`, reported sum is `13.063`
C. `7.21 + 12.141 + 0.0028`, reported sum is `19.35`
D. `3.74 - 0.0016`, reported difference is `3.74`

Explanation

The reported sum should have least number of significant figures to the demical point.