**Core Concept**
The **Cartridge-Based Nucleic Acid Amplification Test (CBNAAT)** is a molecular diagnostic test used to detect **Mycobacterium tuberculosis** and resistance to rifampicin. This test is based on **real-time PCR** technology. It is a rapid diagnostic tool for tuberculosis.

**Why the Correct Answer is Right**
CBNAAT is a **WHO-endorsed** diagnostic test that uses **nucleic acid amplification** to detect mycobacterial DNA. The test is highly sensitive and specific, providing results within 2 hours. It targets the **rpoB** gene to detect rifampicin resistance.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect as it does not represent the full form of CBNAAT.
**Option B:** Incorrect as it is not related to the molecular diagnostic test.
**Option D:** Incorrect as it is not the full form of CBNAAT.

**Clinical Pearl / High-Yield Fact**
CBNAAT is a **point-of-care** diagnostic test, making it useful in resource-limited settings. It has high sensitivity and specificity for detecting tuberculosis.

**Correct Answer:** C. Cartridge-Based Nucleic Acid Amplification Test.