A. Right atrium
A.
B. Right ventricle
B.
C. Left atrium
C.
D. Left ventricle
D.
Correct Answer: D
সঠিক উত্তর: D
Explanation
ব্যাখ্যা
The left ventricle needs to pump oxygenated blood to the entire body, requiring a strong muscular wall to generate high pressure, making it the thickest among all the heart chambers.