Name this vitamin that prevents rickets.
One of the symptoms in people with a deficiency of this compound is a line across the thorax called Harrison's groove. There are five varieties of this compound, the first of which is a combination of lumisterol and ergocalciferol. Technically a hormone precursor, it maintains blood levels of phosphorus and calcium, and a lack of it in adults results in osteomalacia. This vitamin's most effective form, cholecalciferol, is created when skin is exposed to ultraviolet rays. Name this vitamin that prevents rickets.
One of the symptoms in people with a deficiency of this compound is a line across the thorax called Harrison's groove.
(Vitamin) {D} (accept {Cholecalciferol} until lumisterol is mentioned)