Answer:
Most likely a fungal infection, Onychomycosis (fungal infection of the nail)
Explanation:
The symptoms of Onychomycosis are discoloration, brittleness or thickening.
The answer would be "B. cocaine". Cocaine is an illegal stimulant unlike the other options listed above.
TRUE!!! because it lets the doctor know of the patients medical history
Answer:
Vitamin B3 ( niacin ) and D
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