**Question:** All are TRUE about Gastrin, EXCEPT:

A. Gastrin is a hormone that stimulates gastric acid secretion and promotes gastric growth.
B. Gastrin is secreted by ECL cells in the stomach.
C. Gastrin increases bile secretion.
D. Gastrin is produced during pregnancy.

**Core Concept:** Gastrin is a hormone involved in regulating gastric acid secretion and promoting gastric cell growth. It is secreted by G cells in the antrum of the stomach in response to gastric emptying or the presence of food in the stomach.

**Why the Correct Answer is Right:**

Option C is incorrect because gastrin primarily stimulates gastric acid secretion and growth, not bile secretion, which is regulated by other hormones like cholecystokinin and secretin. Gastrin's effect on bile secretion is minimal compared to its impact on gastric acid production and cell growth.

**Why Each Wrong Option is Incorrect:**

Option A is true as stated: Gastrin stimulates gastric acid secretion and promotes gastric growth. This is a crucial aspect of its role in the gastrointestinal system.

Option B is true as stated: Gastrin is secreted by G cells in the antrum of the stomach, which responds to gastric emptying and the presence of food in the stomach.

Option D is false: Gastrin production is not significantly influenced by pregnancy, unlike other hormones like progesterone. Gastrin secretion is primarily regulated by gastric emptying, the presence of food, and the acidity of the stomach.

**Correct Answer:**

Clearly, option C is the incorrect statement about gastrin. Therefore, the correct answer is:

**Correct Answer: Gastrin increases gastric acid secretion and promotes gastric cell growth, but does not significantly influence bile secretion (C).**