Where immovable property is sold in execution of a decree and such sale has become absolute. When the property shall be deemed to have vested in the purchaser?

In the context of the Code of Civil Procedure, when immovable property is sold in execution of a decree, it typically vests in the purchaser from the time when the sale becomes absolute. This means that once the sale is finalized and no objections or challenges remain, the property is considered to have been transferred to the purchaser.

Therefore, the correct answer is Option A: From the time when the sale becomes absolute. The other options (B, C, and D) do not accurately represent the legal process of when the property vests in the purchaser in such cases.