20 year old girl with decrease BMI =16, history of anorexia nervosa comes in clinic with complaint of multiple fractures, her bones are so fragile that they often break

20 year old girl with decrease BMI =16, history of anorexia nervosa comes in clinic with complaint of multiple fractures, her bones are so fragile that they often break, What is your diagnosis:
a. Osteoporosis
b. Hypovitaminosis osteopenia
c. Osteogenesis imperfecta
d. Osteomalacia