What is the atrio-ventricular septum made of?

Q. What is the atrio-ventricular septum made of?
A. Cartilage
B. Fibrous tissue
C. Osteocytes
D. Mucous membrane
Answer: Fibrous tissue

A. Cartilage
B. Fibrous tissue
C. Osteocytes
D. Mucous membrane
Answer: Fibrous tissue