Option A is correct. A convulsion is a general term that people use to describe uncontrollable muscle contractions. Some people may use it interchangeably with the word “seizure” although a seizure refers to an electrical disturbance in the brain. Seizure may cause a person to have convulsions, but this is not always the case.
A convulsion is an episode in which you experience rigidity and uncontrolled muscle spasm along with altered consciousness.
It cause motions that generally last a minute or two.
A seizure, also called a grand mal seizure, causes muscle contractions and loss of consciousness.
Learn more about muscle convulsion here: