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'.
Q: Question: What is the name of the set of dysregulations of the neurovegetative nervous system and of the basic psychic functions, which persist for a long period of time, months or years, after achieving abstinence?
Options: <1> Cross tolerance <2> Korsakoff syndrome. <3> Acute intoxication. <4> Late withdrawal syndrome. <5> Dual disorder.
A:
4