**Core Concept**
The process of putrefaction in the human body is influenced by various factors, including the presence of oxygen, microbial flora, and the organ's composition. In females, the reproductive organs are particularly susceptible to putrefaction due to their high water content and rich blood supply.

**Why the Correct Answer is Right**
The organ that putrefies last in females is the **Cervix**. This is because the cervix has a relatively low water content and a thicker layer of connective tissue compared to other reproductive organs, such as the uterus and vagina. Additionally, the cervix has a more limited blood supply, which slows down the process of putrefaction. The cervix is also more resistant to microbial invasion, further contributing to its delayed putrefaction.

**Why Each Wrong Option is Incorrect**
**Option A:** The uterus is not the correct answer because it has a high water content and a rich blood supply, making it more prone to putrefaction.

**Option B:** The ovaries are not the correct answer because they are relatively small and have a limited blood supply, but they are still more susceptible to putrefaction than the cervix.

**Option C:** The vagina is not the correct answer because it has a high water content and a rich microbial flora, making it more prone to putrefaction.

**Clinical Pearl / High-Yield Fact**
The order of putrefaction in the human body is generally as follows: gut > lungs > liver > kidneys > pancreas > spleen > heart > brain > reproductive organs. This can be remembered using the mnemonic "Gut Lungs Liver Kidneys Pancreas Spleen Heart Brain" (GLLKPSHB).

**Correct Answer:** D.