**Core Concept**
Advanced Proliferative Diabetic Retinopathy (PDR) is characterized by the formation of new, fragile blood vessels and extensive fibrosis, leading to tractional retinal detachment. The primary goals of treatment are to remove vitreoretinal traction, reattach the retina, and prevent further vision loss.

**Why the Correct Answer is Right**
Exophotocoagulation, also known as laser photocoagulation, is a treatment that involves applying laser energy to the retina to reduce neovascularization and prevent further vision loss. However, in the context of advanced PDR with extensive vitreoretinal fibrosis and tractional retinal detachment, exophotocoagulation is not sufficient to address the underlying issues of vitreoretinal traction and retinal detachment. Instead, more invasive procedures are required.

**Why Each Wrong Option is Incorrect**
**Option A:** While reattachment of detached or torn retina may be a necessary step in the treatment of advanced PDR, it is not the primary goal of treatment. The primary goal is to remove vitreoretinal traction and prevent further vision loss.
**Option B:** Removal of epiretinal membrane (ERM) is a crucial step in the treatment of advanced PDR, as ERMs can cause significant vitreoretinal traction and retinal detachment. Removing the ERM can help relieve traction and allow for retinal reattachment.
**Option C:** Vitrectomy is a surgical procedure that involves removing the vitreous gel and any blood or fibrotic tissue that may be causing tractional retinal detachment. It is a critical step in the treatment of advanced PDR and can help relieve vitreoretinal traction and promote retinal reattachment.

**Clinical Pearl / High-Yield Fact**
In advanced PDR, the key to successful treatment is to address the underlying issues of vitreoretinal traction and prevent further vision loss. This often requires a combination of surgical procedures, including vitrectomy and removal of epiretinal membranes, in addition to laser photocoagulation.

**Correct Answer:**
✓ Correct Answer: D. Exophotocoagulation.