Task: Question Answering
Input (English): Question: Which of the following associations (disease - symptom or clinical sign) is incorrect? 
 Options:  <1> Measles - Koplik spots. <2> Sudden exanthema - Fever. <3> Infectious erythema - Anemia due to spinal aplasia. <4> Varicella - occipital adenopathies. <5> Scarlet fever - Fever and dysphagia.
Output (English): 4