**Number of Lobes in the Liver**

The liver is a vital organ located in the upper right side of the abdomen. It is the largest internal organ in the human body and performs various functions, including detoxification, metabolism, storage of nutrients, and production of bile. The liver is comprised of lobes, which are distinct sections that make up its overall structure.

**Answer: d. 4**

There are four lobes present in the liver, namely:

1. **Right Lobe:** The right lobe is the largest and occupies a major portion of the liver. It is primarily located on the right side of the body and is separated from the left lobe by a prominent structure called the falciform ligament.

2. **Left Lobe:** The left lobe is situated on the left side of the body and is smaller in size compared to the right lobe. It is separated from the right lobe by the falciform ligament. The left lobe extends toward the back of the body and is further divided into two smaller lobes called the medial and lateral lobes.

3. **Caudate Lobe:** The caudate lobe is a smaller lobe located on the posterior side of the liver. It is situated between the left lobe and the inferior vena cava (a large vein that carries deoxygenated blood from the lower body to the heart). The caudate lobe has a unique shape, resembling a "tail."

4. **Quadrate Lobe:** The quadrate lobe is a small lobe located on the inferior surface of the liver. It is situated between the gallbladder and the left lobe, near the porta hepatis (the area where the hepatic artery, hepatic portal vein, and bile duct enter and exit the liver).

In summary, the liver consists of four lobes: the right lobe, left lobe (divided into medial and lateral lobes), caudate lobe, and quadrate lobe. Each lobe plays a crucial role in the overall function of the liver, contributing to its complex physiological processes.

Correct option is b

Human liver is bilobed. left lobe and right lobe. left lobe is smaller than right lobe .
Right lobe is further divided into four sub lobes....