Final answer:
The correct answer to the symptom of hypertension is (d) none of the above, as hypertension is commonly a silent condition without noticeable symptoms.
Step-by-step explanation:
The most common symptom of hypertension is actually a trick question because hypertension is typically a silent condition that often doesn't produce any noticeable symptoms. Out of the options provided, the correct answer is (d) none of the above, because high blood pressure usually does not cause symptoms such as shortness of breath, tightness in the chest, or headaches. Instead, hypertension is often detected through routine medical check-ups. Therefore, the nature of hypertension as a 'silent killer' underscores the importance of regular blood pressure monitoring.