The falciform ligament separates the:.
a. right and left lobes of the liver.
b. quadrate and right lobes of the liver.
c. caudate and quadrate lobes of the liver.
d. liver from the gallbladder.

The falciform ligament separates the a. right and left lobes of the liver.

Explanation:

The falciform ligament is a ligament that attaches the liver to the front body wall, and separates the liver into the left medial lobe and left lateral lobe.The falciform ligament is a broad and thin peritoneal ligament. It is sickle shaped and a remnant of the ventral mesentery of the fetus. The falciform ligament droops down from the hilum of the liver.It contains between its layers a small but variable amount of fat and its free edge contains the obliterated umbilical vein  and if present, the falciform artery and paraumbilical veins. The falciform ligament divides the left and right subphrenic compartments but may still allow passage of fluid from one to the other.The falciform ligament stretches obliquely from the front to the back of the abdomen, with one surface in contact with the peritoneum behind the right rectus abdominis muscle and the diaphragm, and the other in contact with the left lobe of the liver.