Concept:
The sex ratio in India (females per 1000 males) has changed over successive Census years.
Step 1: Recall the Census-wise sex ratio.
\[
\boxed{
\begin{aligned}
1981 &\rightarrow 934,
1991 &\rightarrow 927,
2001 &\rightarrow 933,
2011 &\rightarrow 940.
\end{aligned}
}
\]
Step 2: Match the lists.
\[
\boxed{
A\!-\!III,\;
B\!-\!I,\;
C\!-\!IV,\;
D\!-\!II
}
\]
Hence,
\[
\boxed{\text{(A)}}
\]