**Core Concept**
Rapidly Progressive Glomerulonephritis (RPGN) is a syndrome characterized by a rapid decline in renal function, typically within a week or less, often leading to end-stage renal disease. This condition can result from various causes, including autoimmune diseases, infections, and vasculitis.

**Why the Correct Answer is Right**
RPGN is associated with severe glomerular injury, often featuring crescent formation, which is a hallmark of this condition. The exact mechanism varies depending on the underlying cause, but it often involves immune complex deposition, complement activation, and subsequent inflammation. In some cases, RPGN can be caused by conditions like Goodpasture's syndrome, which involves anti-GBM antibodies targeting the glomerular basement membrane.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as RPGN can occur in Goodpasture's syndrome, which is characterized by the presence of anti-GBM antibodies.
**Option B:** This option is incorrect as RPGN can be caused by systemic lupus erythematosus (SLE), an autoimmune disease that can affect multiple organs, including the kidneys.
**Option C:** This option is incorrect as RPGN can occur in post-streptococcal glomerulonephritis, a condition that results from an immune response to streptococcal infections.

**Clinical Pearl / High-Yield Fact**
RPGN often requires prompt and aggressive treatment, including immunosuppression and dialysis, to prevent progression to end-stage renal disease. Early recognition and intervention are crucial in improving outcomes.

**Correct Answer:** D