Answer:
The most likely etiology is that the boy has a Coxsackie virus.
Explanation:
The symptoms of a Coxsackie virus infection are painful blisters on the throat, hard palate, tongue, and inside the mouth that makes the kid refuse to drink or eat. Also, the blisters on the arms, hands, soles of the feet, and legs. The infection symptoms start abruptly, like in this case, from one day to the other.
They are most mainly consists of "Keratin"
So, option B is your answer.
Hope this helps!
Chlamydia is a primary pathogen
The best answer from the choices given would be option A. The luminol test is capable of detecting bloodstains diluted up to 100,000 times. However, the correct value here is 300,000. The luminol test can still read up to that value. Luminol test has found some great application in crime scene investigations. It is able to find traces of blood even if someone has cleaned or removed stains.