Ans: C
The maximum absolute error for the accuracy correct to $3$ significant figures
$\begin{array}{cl}
= & \dfrac{1}{2} \times 0.1 \\
= & 0.05
\end{array}$
Therefore, the range of values of $y$ is
$\begin{array}{rclll}
73.8-0.05 & \le & y & < &73.8+0.05 \\
73.75 & \le & y & < &73.85
\end{array}$
