Explanation:

- An order allowing or disallowing an application for amendment (like amendment of pleadings under Order VI Rule 17 CPC) is not a decree.

- A decree (Option 2) is a formal expression of adjudication conclusively determining the rights of the parties.

- It is also not specifically included in the list of appealable orders under Order XLIII Rule 1 of CPC (Option 3).

- So, such an order is generally not directly appealable unless it affects a substantial right and may be challenged in an appeal against the final decree, if any.

- Therefore, the correct answer is:

Option:4 – None of the above