The doctor left some medicines with the instructions for giving them. One was to (1)_____ down the fever and another to overcome an acid condition. “The germs (2)_____ influenza can exist only in acid condition,” he explained. He said there was (3)_____ to worry if the fever did not go up above 103 degrees. This was an (4)_____ of flu and there was no danger if pneumonia could be (5)_____.
Select the most appropriate option to fill in the blank no. 3.