What are the manifestations that appear in diabetic patients?

Piel seca
Callosidades
Fisuras y grietas
Erosiones
Ampollas
Úlceras
Gangrena
a) I, II, and III are correct.
b) IV, V, and VI are correct.
c) I, II, III, IV, V, VI, and VII are correct.
d) All of the above are incorrect.