Which one of the following statements is not correct?

Vitamins and deficiency diseases The deficiency of different Vitamins causes different deficiency diseases described as follows: • In its more severe forms, vitamin A deficiency contributes to blindness by making the cornea very dry, thus damaging the retina and cornea. Hence statement A is correct. • Vitamin C is found in citrus fruits and vegetables. Scurvy results from a deficiency of vitamin C in the diet. o Symptoms may not occur for a few months after a person's dietary intake of vitamin C drops too low. o Bruising, bleeding gums, weakness, fatigue, weight loss, poor wound healing, and rash are among scurvy symptoms. Hence statement B is correct and statement C is incorrect. • Vitamin B12 deficiency may lead to a reduction in healthy red blood cells (anaemia). The nervous system may also be affected. Diet or certain medical conditions may be the cause. Symptoms are rare but can include fatigue, breathlessness, numbness, poor balance and memory trouble. Hence statement D is correct.