Madam Malkin owns Madam Malkin's Robes for All Occasions, the robe shop in Diagon Alley where Harry gets fitted for his Hogwarts robes. This is where he first meets Draco Malfoy. Option C is correct. Options A, B, and D are incorrect: Madam Hooch is the flying instructor, Dedalus Diggle is a wizard, and Madam Pomfrey is the hospital matron. Madam Malkin is a squat witch who helps fit robes.