Cusps of ______ resemble half-moon shape?(a) Tricuspid(b) Semilunar valve(c) Bicuspid valve(d) Eustachian valve

The correct answer is (b) Semilunar valve.

Explanation:

The semilunar valves are located in the heart, specifically between the ventricles and the arteries (the aorta and pulmonary artery).
These valves have a unique shape that resembles a half-moon or crescent shape. The cusps of the semilunar valves are shaped like this to allow the valve to open and close efficiently as blood is pumped out of the heart.
The other options are:

Tricuspid valve: This valve has three cusps and is located between the right atrium and right ventricle.
Bicuspid valve: Also known as the mitral valve, it has two cusps and is located between the left atrium and left ventricle.
Eustachian valve: This is a small valve in the heart, but it does not resemble a half-moon shape like the semilunar valve.
Thus, the correct answer is (b) Semilunar valve.