The correct option is
B Tricuspid valve
The heart has four chambers. The upper two chambers are the atria, and the lower two are the ventricles (Figure A). The chambers are separated by a wall of tissue called the septum. Blood is pumped through the chambers, aided by four heart valves.
There are four heart valves in the heart. They are:
The tricuspid valve, located between the right atrium and the right ventricle.
The pulmonary (pulmonic) valve, between the right ventricle and the pulmonary artery.
The mitral valve, between the left atrium and left ventricle.
The aortic valve, between the left ventricle and the aorta.
So the answer is 'Tricuspid valve'.