The first answer because it lets his father know he is worried about him
The correct answer would be #3.
<span>The correct answer is C-analgesics. They are the pain-killers and produce an effect of analgesia. They have nothing to do with the micro-organsim caused infection, as neither do they stop microbial growth, nor the analgesics kill them. Rest 3 tools act upon the microbes, and have reduced the number of infection-related mortalities. </span>
