Answer:
B. QRS wave
Explanation:
The position of QRS wave on an electrocardiogram corresponds with the point of highest blood pressure in the vessels leaving the heart. Hence, option (b) is the correct answer.
D. Use a condom during every sexual encounter
Answer:
The correct answer is d) renal calculi
Explanation:
Renal calculi are the kidney stones that are formed when salts and minerals are joined together and formed a stone in the kidney. They can cause a dull. constant pain at the lower back or along the right costovertebral angle.
The other symptoms are nausea and vomiting, burning sensation during urination, blood in urine, smelly urine, etc. Small stones can be dissolved by medication and consumption of more water but in some cases the stones are so large that operations are necessary to take out the stone from the kidney.
These stones, when passed through urine, can cause severe pain and bloody urine. So the right answer is d. renal calculi.
