How do I differentiate radio buttons in android?

This is my code and when I try to run it and when I select headache, sweating, weakness, chills, bone pain and joint pain viralfever.class activity gets started instead of chickengunia.class. What is the problem here?

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.questionnaire);


    final Button go = (Button) findViewById(R.id.submit);

    go.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (headache.isChecked() && sweating.isChecked() && weakness.isChecked() && chills.isChecked()) {
                Intent Intents = new Intent(Questionnaire.this, ViralFever.class);
                startActivity(Intents);

            }

  else   if (headache.isChecked() && bonepain.isChecked() && weakness.isChecked() && rashes.isChecked()) {
                Intent Intents = new Intent(Questionnaire.this, Dengue.class);`enter code here`
                startActivity(Intents);

            }

else    if (headache.isChecked() && sweating.isChecked() && skinyellow.isChecked() && palestools.isChecked() && abdoman.isChecked()) {
                Intent Intents = new Intent(Questionnaire.this, Jaundice.class);
                startActivity(Intents);

            }
    else     if (diarrhea.isChecked() && sweating.isChecked() && nausea.isChecked() && dehydration.isChecked()) {
                Intent Intents = new Intent(Questionnaire.this, Cholera.class);
                startActivity(Intents);

            }
            else if (headache.isChecked() && sweating.isChecked() && weakness.isChecked() && shiver.isChecked()&& abdoman.isChecked()) {
                Intent Intents = new Intent(Questionnaire.this, Malaria.class);
                startActivity(Intents);

            }
     else    if (headache.isChecked() && sweating.isChecked() && weakness.isChecked() && chills.isChecked()  && bonepain.isChecked() && jointpain.isChecked()) {
                Intent Intents = new Intent(Questionnaire.this, Chickengunia.class);
                startActivity(Intents);

            }
       else   if (headache.isChecked() && sweating.isChecked() && weakness.isChecked() && chills.isChecked()&& diarrhea.isChecked()&& nausea.isChecked()&& sorethroat.isChecked()&& cough.isChecked()&& runningnose.isChecked()) {
                Intent Intents = new Intent(Questionnaire.this, Swineflu.class);
                startActivity(Intents);

            }
      else   if (headache.isChecked() && sweating.isChecked() && weakness.isChecked() && chills.isChecked()&& rashes.isChecked()) {
                Intent Intents = new Intent(Questionnaire.this, Typhoid.class);
                startActivity(Intents);

            }
            else
            {
                Intent Intents = new Intent(Questionnaire.this, Checkup.class);
                startActivity(Intents);
            }
            }

    });

}

}

This is my class file and it executes only the first if statement because the buttons I selected are in that statement.