Most thick walled and largest chamber of the heart is?(a) Right auricle(b) Right ventricle(c) Left auricle(d) Right auricle

The correct answer is (b) Right ventricle.

Explanation:

The heart is made up of four chambers: two atria (auricles) and two ventricles.
The walls of the heart chambers vary in thickness depending on the function of each chamber.
The ventricles are the chambers that pump blood out of the heart.
The right ventricle has a thicker wall compared to the right auricle because it needs to pump blood to the lungs at a higher pressure.
The left ventricle has the thickest wall of all the chambers because it pumps blood to the entire body, which requires a lot of force.
Thus, the right ventricle is the thickest-walled chamber among the options provided.