The correct option is A Surgery
Renal calculi or kidney stones are deposition of salt crystals within the kidney. Very small kidney stones go unnoticed and are not harmful. Such stones can be removed just by maintaining a proper diet and drinking lots of water. But notable size kidney stones can cause severe stomach ache, fever, vomiting, backache etc.
Previously surgical removal of kidney stones was the only way to remove kidney stones. But the surgical method is painful and invasive.
Nowadays several other remedies are available for treating kidney stones such as medications, ultrasound shock wave therapy etc. Ultrasound shock wave therapy is the non-invasive method in which ultrasound shock waves are delivered from outside to the patient’s body to break up the calculi.