Task: Question Answering
Input (English): Question: In anorexia nervosa, and in relation to menstrual / reproductive function, which of the statements is true according to the DSM-IV-TR criteria? 
 Options:  <1> The existence of amenorrhea is a basic diagnostic criterion. <2> We do not consider that the amorrea is significant until the patient has presented it for at least one year. <3> The amorrea, when it exists, is always primary, never secondary. <4> Amorrhea is a characteristic of this disorder but not a basic diagnostic criterion. <5> Without the presence of amorrea, anorexia nervosa can be diagnosed.
Output (English): 1