**Core Concept**
Ureteric colic is a clinical manifestation of ureteral obstruction, typically caused by a kidney stone (nephrolithiasis) that blocks the flow of urine through the ureter. The resulting pain is severe, usually colicky in nature, and radiates from the flank to the groin.

**Why the Correct Answer is Right**
Ureteric colic is characterized by severe, intermittent pain that radiates from the flank to the groin. This pain is often described as colicky, meaning it comes and goes in waves. The pain is usually accompanied by nausea and vomiting, and may be associated with hematuria (blood in the urine). The severity of the pain is often out of proportion to the physical findings, which may be minimal.

**Why Each Wrong Option is Incorrect**
**Option A:** Severe, intermittent pain is a hallmark of ureteric colic, so this option is incorrect because it does not characterize the condition.
**Option B:** Nausea and vomiting are common associated symptoms of ureteric colic, so this option is incorrect because it does not describe a feature that differentiates from the condition.
**Option C:** Hematuria may be present in ureteric colic, so this option is incorrect because it does not characterize a feature that is not present in the condition.

**Clinical Pearl / High-Yield Fact**
Ureteric colic is often described as a "tearing" or "burning" pain that radiates from the flank to the groin. This pain is usually severe and intermittent, and may be accompanied by nausea and vomiting.

**Correct Answer: A. Severe, intermittent pain is a hallmark of ureteric colic.**