Final answer:
The cellular half-life of Intestinal Crypt cells is 24 hours.
Step-by-step explanation:
The cellular half-life of Intestinal Crypt cells is 24 hours.
The retention time of food in the small intestine is approximately four hours, while the retention time of food in the entire length of the intestine ranges from 24 to 72 hours.
Therefore, option B) 24 hours is the correct answer.