The correct answer is Osteomalacia.Vitamin D: It is also called Calciferol. It helps in the absorption of calcium dissolved in the blood, It prevents the weakening of bone and teeth.Vitamin D also has other functions in the body, including cell growth, neuromuscular and immune function, and reduction of inflammation.Vitamin D deficiency can cause rickets in children and osteomalacia in adults. Osteomalacia refers to a marked softening of your bones.The softened bones of children and young adults with osteomalacia can lead to bowing during growth, especially in weight-bearing bones of the legs.Osteomalacia in older adults can lead to fractures.Additional Information Osteoporosis It is an age-related disorder characterized by decreased bone density and increased chances of fracture.It is commonly seen in elderly people.Club-footIt is a disease in which children are born with a deformity in their legs resulting in twisted legsOsteomyelitisOsteomyelitis is a bacterial, or fungal, infection of the bone.If it is not treated in time it may become chronic and cause a loss of blood supply to the affected bone