Assertion: Blood continuously flows into the arterioles and capillaries from the arteries even during the ventricular diastole.
Reason: The arteries remain pressurized throughout the cardiac cycle.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Assertion: Although rare, but runners and athletes can suffer heart failure if they stop vigorous exercise abruptly.
Reason: To reduce the risk athletes are encouraged to follow hard exercise with moderate activity such as walking.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: Sudden emotional stress at the sight of blood may lead to syncope [fainting] in some individuals.
Reason: Due to sudden stress, simultaneous enhancement of parasympathetic nervous system (vagal) tone and withdrawal of sympathetic nervous system tone may occur.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: The first and the second heart sounds are produced by the closure of AV and semilunar valves respectively.
Reason: The opening of the valves should not produce any sounds under normal physiological conditions.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: Coronary arteries are especially vulnerable to obstruction by atherosclerotic plaques or thrombus.
Reason: Coronary arteries supply oxygenated blood to the muscles of the heart itself.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: Hypertension is a risk factor for coronary artery disease and stroke.
Reason: Hypertension damages arterial endothelium promoting plaque formation.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 

In the light of the above statements choose the correct answer from the options given below: 

The second largest constituent of plasma is:
1. Water
2. Proteins
3. Glucose
4. Hormones

A person with which of the following blood groups can receive blood from a donor of only his/her own blood group?

Certain factors that can initiate coagulation of blood can be released by: