A young bank manager presented with acute severe lower abdominal pain which is radiating towards inguinal region. USG shows renal stones. Conservative management in this patient is indicated when:

**Core Concept**
The management of renal colic caused by renal stones involves a combination of conservative and interventional approaches. Conservative management aims to alleviate pain, prevent complications, and promote spontaneous passage of the stone. This approach is particularly relevant in patients with small, non-obstructive stones.

**Why the Correct Answer is Right**
The correct answer is related to the size and location of the renal stone. Small stones (5mm) or those causing obstruction are more likely to require intervention, such as lithotripsy or ureteroscopy.

**Option B:** This option is incorrect because patients with a history of kidney stones, infection, or other comorbidities may require more aggressive management and monitoring.

**Option C:** This option is incorrect because patients with severe symptoms, such as hematuria or flank pain, may require more immediate intervention.

**Clinical Pearl / High-Yield Fact**
In patients with renal colic, the presence of a small stone (<5mm) on USG is a strong predictor of spontaneous passage and conservative management success. **Correct Answer:** D.

✓ Correct Answer: A. A stone less than 6 mm in size