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 ) .
According to the above context, choose the best option to answer the following question.
Question: How does ultrasound find gall stones ?
Options:
- It is a magical wand type tool witches use .
 - None of the above choices .
 - Ultra sound is what the rolling stones do .
 - Ultra sound is the way people who sing " ultra " well can predict stones .


None of the above choices .