Task: Question Answering
Input (English): Question: The antiviral tamiflu that is used against the bird flu virus acts: 
 Options:  <1> Inhibiting viral neuraminidase. <2> Inactivating the viral protease responsible for the processing of capsomere precursors. <3> Preventing the decapsidation of viral particles. <4> Blocking the interaction of viral particles with their cellular receptor. <5> Altering the activity of the viral DNA polymerase.
Output (English): 1