Assertion (A): A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations.

Reason (R): Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen.

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

The correct answer is: Both (A) and (R) are true and (R) is the correct explanation of (A).

Step-by-step Explanation:

1. Analyzing Assertion (A):
Assertion (A) states that a person experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations when going to high altitudes.
This is biologically true. At high altitudes, the body experiences a sudden decrease in oxygen availability, leading to altitude sickness. Common symptoms include breathing difficulty (dyspnea), rapid heart rate (palpitations), fatigue, nausea, and dizziness. Therefore, Assertion (A) is true.

2. Analyzing Reason (R):
Reason (R) states that due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen.
This is scientifically accurate. As altitude increases, atmospheric pressure decreases. Because of the lower atmospheric pressure, the partial pressure of oxygen in the air also drops, making it harder for oxygen to diffuse from the lungs into the bloodstream. As a result, the body suffers from hypoxia (lack of sufficient oxygen supply to tissues). Therefore, Reason (R) is true.

3. Evaluating the Connection:
The low atmospheric pressure and resulting oxygen deficiency described in Reason (R) are the direct physiological cause of the altitude sickness symptoms (breathing difficulty and palpitations) described in Assertion (A).
Thus, Reason (R) is the correct explanation for Assertion (A).