## **Core Concept**
The question describes a clinical presentation suggestive of a renal condition, likely **post-streptococcal glomerulonephritis (PSGN)**, which is characterized by the triad of hematuria (often described as cola-colored urine), proteinuria, and a history of a preceding infection, commonly a rash caused by Group A beta-hemolytic streptococcus.

## **Why the Correct Answer is Right**
The correct answer, **PSGN**, is supported by the clinical presentation:
- **Cola-colored urine** indicates the presence of hematuria, which is a hallmark of glomerular injury.
- **Proteinuria (2+)** suggests kidney damage leading to loss of albumin through the urine.
- **History of rash 2 weeks ago** points towards a post-infectious complication, as the latent period between the streptococcal infection and the onset of renal symptoms is typically 1-3 weeks.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not provided, but typically, other glomerulonephritides or nephrotic syndromes could be considered. However, the specific history of a preceding rash and the acute presentation make PSGN more likely.
- **Option B:** Similarly, this option is not specified, but conditions like IgA nephropathy could present with hematuria and proteinuria. However, the history of a preceding rash is more classically associated with PSGN.
- **Option D:** Without specifics, it's hard to directly refute, but conditions like nephrotic syndrome primarily present with significant proteinuria and edema, not typically cola-colored urine.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that **PSGN often follows a streptococcal infection**, such as pharyngitis or impetigo. The renal manifestations can occur after a variable latent period, usually 1-3 weeks. The classic presentation includes hematuria, proteinuria, and sometimes hypertension. The condition is usually self-limiting, but supportive care is crucial.

## **Correct Answer: C. Post-Streptococcal Glomerulonephritis (PSGN).**