**Question:** Sentinel node of gall bladder is -

**Core Concept:**
The concept being tested is the concept of sentinel nodes, which are the first lymph node(s) to which lymphatic fluid drains from a specific area, providing early information about the presence of infection or disease in that area. In the context of the gallbladder, sentinel nodes serve as the first nodes to receive lymphatic fluid from the gallbladder.

**Why the Correct Answer is Right:**
In the context of the gallbladder, the sentinel node is the first lymph node to receive lymphatic fluid from the gallbladder. In this case, the correct answer is C: **Correct Answer: C. Triangle of Dudley**.

The Triangle of Dudley is a triangular region on the lesser sac, located between the cystic duct, cystic artery, and the hepatoduodenal ligament. Lymphatic drainage from the gallbladder typically follows the course of the cystic duct and ends in the lymph nodes within the Triangle of Dudley.

**Why Each Wrong Option is Incorrect:**
A) **Option A (hepatic hilum)**: The hepatic hilum is a region containing the hepatic veins and portal vein, which is not the site of lymphatic drainage for the gallbladder.
B) **Option B (right lobe of the liver)**: The lymphatic drainage from the gallbladder primarily occurs through the Triangle of Dudley, not the right lobe of the liver.
D) **Option D (common hepatic duct)**: The common hepatic duct is the site of drainage for bile, not lymphatic fluid from the gallbladder.

**Clinical Pearl:**
Understanding the lymphatic drainage pattern of the gallbladder is crucial for surgeons, as knowledge of the lymphatic drainage pathway can help guide surgical procedures involving the gallbladder (e.g., cholecystectomy) to minimize complications like bile leakage and cholecystitis.