Well, technically, there are two of each as shown below.
Explanation:
he + ran
boy + lost
If you had to choose only ONE pair as the answer, then go with "boy + lost" because they are contained in the main (independent) clause of the entire sentence. The entire sentence is actually a complex sentence because it is composed of a dependent (subordinating) clause + an independent (main) clause.
Because a subject is a person,place,thing,or idea. And the boy is a person so therfore he is the subject. The verb is an action. So when it says the boy ran what is he doing, running. So therfore ran is the verb.
