**Question:** Which among the following is TRUE regarding umbilical cord?

A. The umbilical cord is a temporary structure that connects the placenta to the fetus during pregnancy.
B. The umbilical cord provides oxygen and nutrients to the fetus and removes waste products.
C. The umbilical cord is a permanent structure that remains attached to the fetus after birth.
D. The umbilical cord has no role in the exchange of gases and nutrients between the fetus and the mother.

**Correct Answer:**

A. The umbilical cord is a temporary structure that connects the placenta to the fetus during pregnancy.

**Core Concept:** The umbilical cord serves as a conduit for essential nutrients, oxygen, and waste removal between the placenta and the fetus. It is a temporary structure that disappears shortly after childbirth due to the process of involution.

**Why the Correct Answer is Right:**

The umbilical cord plays a critical role in facilitating gas exchange and nutrient transportation between the placenta and the fetus. It is a temporary structure because the fetal-maternal interface, including the placenta, is constantly evolving to adapt to the changing fetal needs. This adaptation ultimately leads to the involution process, which results in the cord's involution and disappearance following childbirth.

**Why Each Wrong Option is Incorrect:**

B. The umbilical cord is a permanent structure that remains attached to the fetus after birth (Incorrect)
C. The umbilical cord has no role in the exchange of gases and nutrients between the fetus and the mother (Incorrect)
D. The umbilical cord is a structure that delivers oxygen and nutrients to the fetus (Incorrect)

**Clinical Pearl:**

Understanding the role of the umbilical cord is essential for healthcare professionals, as it aids in assessing fetal wellbeing during prenatal care. Knowledge of the umbilical cord's function and involution process helps in anticipating complications like cord prolapse and managing them appropriately during childbirth.