The valve present between the left auricle and left ventricle is (a) Tricuspid valve(b) Bicuspid valve(c) Mitral valve(d) Aortic valve

The correct answer is (b) Bicuspid valve.

Explanation:

The human heart consists of four chambers: the left and right atria (upper chambers) and the left and right ventricles (lower chambers). Between these chambers, valves ensure the unidirectional flow of blood and prevent backflow.

Tricuspid Valve - This valve is located between the right atrium and right ventricle. It has three cusps or flaps, hence the name "tricuspid."

Bicuspid Valve (Mitral Valve) - The bicuspid valve, also known as the mitral valve, is present between the left atrium (auricle) and the left ventricle. It has two cusps, giving it the name "bicuspid." The mitral valve controls blood flow from the left atrium to the left ventricle, preventing backflow.

Aortic Valve - This valve is located at the opening between the left ventricle and the aorta, preventing blood from flowing back into the ventricle after it is pumped out to the body.

Therefore, the valve between the left auricle and the left ventricle is the bicuspid valve (mitral valve), making option (b) Bicuspid valve the correct answer.