Given the task definition and input, reply with output. In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Question: The episodic memory is:
Options: <1> Not declarative or implicit, that keeps skills, habits or routines of daily life. Their acquisition depends on the amount of time spent practicing them and the type of training used. <2> Declarative or explicit, of personal experiences based on the memory of concrete events that can be localized in time and in a specific place. <3> Long-term semantics <4> The one that allows to retain concepts, knowledge and events. <5> Which is used in the short term, for example, to remember the verse of a song by repeating it several times for a few minutes.
2