<prompt> What is the most common underlying cause responsible for the disease in which this X ray finding is seen?Calcium deficiencyPhosphate deficiencyVit D deficiencyVit C deficiency  <response>: The given X rays shows widening, cupping fraying at metaphyseal ends of forearm bones- suggestive of Rickets Vitamin C deficiency- Pencil thin coex, Pelken spurs, Wimberger ring sign 