Step 1:
Aitareyopanişad belongs to Rgveda, while Chandogyopanişad belongs to Sāmaveda.
\[
A \rightarrow II,\quad B \rightarrow I
\]
Step 2:
Isopanişad is associated with Yajurveda.
\[
C \rightarrow IV
\]
Step 3:
Prašnopanişad belongs to Atharvaveda.
\[
D \rightarrow III
\]
Step 4:
Thus, the correct sequence is:
\[
A-II,\; B-I,\; C-IV,\; D-III
\]
Hence, the correct answer is:
\[
\boxed{\text{(3)}}
\]