Explanation
Transitive verbs require an object. A transitive verb is one that is used with an object: a noun, phrase, or pronoun that refers to the person or thing that is affected by the action of the verb. However, it is clear that there is no object in the given sentence. Hence, it can be ruled out. On the other hand, an intransitive verb expresses a doable activity and doesn't have a direct object.
Regular verbs form different tenses according to an established pattern. Irregular verbs don’t follow the normal rules. For eg: is can take the form of is, was, been, being etc