Step 1:
Commercial banks mainly perform:
\[
\boxed{\text{Accepting Deposits and Lending}}
\]
Thus:
\[
A \rightarrow III
\]
Step 2:
Regional Rural Banks mainly provide:
\[
\boxed{\text{Rural Credit}}
\]
Thus:
\[
B \rightarrow I
\]
Step 3:
• Co-operative Banks work on Mutual Help Principle
• Development Banks provide Industrial Finance
Thus:
\[
C \rightarrow IV
\]
\[
D \rightarrow II
\]
Step 4:
Final matching is:
\[
A-III,\; B-I,\; C-IV,\; D-II
\]
Hence, the correct answer is:
\[
\boxed{\text{(1) A-III, B-I, C-IV, D-II}}
\]