Task: Question Answering
Input (English): Question: What is the essential characteristic of dissociative disorders, according to the DSM-IV-TR? 
 Options:  <1> An alteration of the integrating functions of consciousness, identity, memory and perception of the environment, which may be this sudden or gradual, transitory or chronic alteration. <2> The presence of one or more identity or personality states that control the behavior of the subject recurrently with the inability to remember important personal information. <3> The persistent and recurrent sensation of distancing of the mental processes and of the own body with the conservation of the sense of reality. <4> The inability to remember important personal information of a traumatic nature. <5> The presence of sudden and unexpected trips away from home with the inability to remember one's past, confusion about one's identity and assumption of a new identity.
Output (English): 1