**Core Concept**
Poststreptococcal glomerulonephritis (PSGN) is an immune-mediated disease following a streptococcal infection, typically affecting the kidneys. It involves the deposition of immune complexes in the glomeruli, leading to inflammation. The condition is characterized by the presence of **low serum complement levels**, particularly **C3**, during the acute phase.

**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss the general pathophysiology. PSGN occurs when immune complexes formed from streptococcal antigens and antibodies deposit in the glomeruli, activating the complement system and leading to glomerular injury. This results in **hematuria**, **proteinuria**, and **hypertension**. The disease is usually self-limiting, with most patients recovering spontaneously.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option details, we cannot directly address why it might be incorrect.
**Option B:** Similarly, without specifics, we cannot discuss its inaccuracies.
**Option C:** And again, lacking details, we cannot explain why it's wrong.
**Option D:** The same issue applies here.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that PSGN typically presents about 2-3 weeks after a streptococcal infection, such as **pharyngitis** or **skin infection**. Monitoring **urinalysis** for **hematuria** and **proteinuria** is crucial in diagnosing and managing the condition.

**Correct Answer:** Correct Answer: D. Hypocalcemia is not typically associated with PSGN.