What skin condition is a flat area of skin discoloration less than 5mm to 1 cm?

What skin condition is a flat area of skin discoloration less than 5mm to 1 cm?

What skin condition is a flat area of skin discoloration less than 5mm to 1 cm? 




A. Cyst
B. Macule
C. Bulla
D. wheal









Answer: B