Task: Question Answering
Input (English): Question: The virions of the Arenavirus contain: 
 Options:  <1> A linear single-stranded RNA molecule. <2> Two equal molecules of linear double-stranded RNA. <3> Two different molecules of linear single-stranded RNA. <4> Two distinct molecules of single-stranded circular RNA. <5> Two identical molecules of single-stranded circular RNA.
Output (English): 4