Step 1:
Quantitative credit control methods regulate the overall volume of credit in the economy.
Step 2:
Quantitative methods include:
• Bank Rate Policy
• Open Market Operations
• Variable Reserve Ratio
Step 3:
• Margin requirements
• Moral suasion
These are qualitative/selective credit control methods.
Step 4:
Correct quantitative methods are:
\[
A,\; B,\; D
\]
Hence, the correct answer is:
\[
\boxed{\text{(2) A, B and D only}}
\]