Context: So Thursday I got the ultrasound and turns out I had a number of gall stones in my gallbladder and one was lodged in the opening that connects the gallbladder to the main duct that connects to the stomach . They took out my gallbladder . Surgery sucks . I have to stay out of school for at least a week and I get some nice pain killers ( percocet ) .
Question: How does ultrasound find gall stones ?
Option 0: It is a magical wand type tool witches use .
Option 1: None of the above choices .
Option 2: Ultra sound is what the rolling stones do .
Option 3: Ultra sound is the way people who sing " ultra " well can predict stones .
Answer: 1