Which statement correctly pairs vitamin D forms with their typical sources and activation pathway?

Vitamin D2 (ergocalciferol) from fungi/mushrooms; vitamin D3 (cholecalciferol) from animal foods and skin synthesis; both are converted in the liver to 25‑OH D and in the kidney to active calcitriol.

D2 and D3 are isomers that are not metabolically interconvertible; D2 is activated in adipose tissue whereas D3 is activated exclusively in muscle tissue.

Vitamin D3 is synthesized only in plants and must be converted to ergocalciferol in the liver before activation in the kidney; vitamin D2 is only synthesized in human skin when exposed to sunlight.

Both D2 and D3 are directly active hormones after absorption and do not require hepatic or renal hydroxylation to become calcitriol.