Step 1: Start with the easiest pair:
Debentures issued at discount can only mean a price lower than face value. That is the meaning in row (I). So D pairs with I. Options (2), (3) and (4) all have D with I, while option (1) has D with IV, so option (1) is out.
Step 2: Use the cash clue:
Debentures for cash come from a public offer through a prospectus. That is statement (IV). So C pairs with IV. Option (2) has C with III and option (4) has C with II, so both are out.
Step 3: Check what is left:
Only option (3) remains. Check its other two pairs. A with II: assets bought from vendors and paid for by debentures is a case of consideration other than cash. B with III: extra debentures given as backup to lenders is collateral security. Both are right.
Final Answer:
Option (3).
\[ \boxed{\text{A-II, B-III, C-IV, D-I}} \]