Explanation:

- Option 1: Promissory Note

- It is a written promise to pay a certain amount to someone on demand or at a fixed future date.

- It is not a cheque.

- Option 2: Hundi

- This is a traditional financial instrument used in South Asian countries.

- It is different from a cheque and usually not recognized in modern banking like cheques.

- Option 3: Bill of Exchange

- A cheque (including a post-dated one) is actually a type of bill of exchange, but it's drawn on a bank and payable on demand.

- A post-dated cheque becomes payable only after the date written on it, making it a bill of exchange until its date arrives.

- Option 4: None of the above

- This would only be correct if none matched, but in this case, option 3 does.