Kelsy contracted an infection caused by a pathogen from the genus trichophyton her doctor gave her a medicated cream to rub on the area and told her to keep it as possible

Trichophyton is a fungi causing infection

Explanation:

Trichophyton belongs to the genus of fungi, it comprises of parasitic varieties and it is the causitive agent for infections such as athletes foot, ringworm, bears and skin scalp, etc. Trichophyton thrives well in an environment that is moist and dark, it also live in soil, animals or humans. This infection spreads easily to other parts of the body and can be contacted through direct contact with infected particles.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current