The correct answer is (d). A decree may be preliminary, final, or partly preliminary and partly final.
A preliminary decree is a temporary order that is made before the final decree is issued. It is usually used to preserve the status quo or to prevent one party from taking any action that could prejudice the rights of the other party.
A final decree is a permanent order that resolves all of the issues in a case. It is usually issued after a trial or after the parties have reached a settlement.
A decree that is partly preliminary and partly final is a hybrid order that contains both preliminary and final elements. This type of order is often used when the court needs to make some interim decisions before it can issue a final decree.
For example, in a divorce case, the court might issue a preliminary decree that grants the parties temporary custody of their children and orders them to sell their house. The court would then issue a final decree after the parties have had a chance to complete the sale of the house and make other arrangements for their children.