The answer is "The boy who wore a green coat carried his sister home".
An adjective clause is likewise called a relative clause or a adjectival clause. A clause is a gathering of words that have a subject and predicate. There are two sorts of clauses: independent and dependent.
Dependent clauses have the subject and predicate however can not remain solitary. They rely upon another clause to have meaning. Illustrations are: "The point at which you complete your work" and "except if I get more cash." With each of these, you need to ask "What?" on the grounds that the musing was not wrapped up.