Step 1: Recall the major functions of money.
- Medium of exchange: Replaces barter by facilitating trade.
- Unit of account: Provides a common measure of value.
- Store of value: Allows value to be saved for future use.
- Standard of deferred payments: Used to settle future payments.
Step 2: Evaluate statements.
- (A) Medium of exchange → Correct.
- (B) Unit of account → Correct.
- (C) Bartering → Wrong; barter exists when money is absent.
- (D) Store of value → Correct.
Step 3: Conclusion.
Correct set of functions = (A), (B), (D).
Final Answer:
\[
\boxed{(A), (B), (D)}
\]