Purchase orders and Material Requisition note

Sir there was this question that I don't seem to understand When charging direct material cost to a job or process, the details would be taken from which document? a purchase requisition b Material requisition c goods recieved note d purchase order my answer was d but it was apparenty wrong I dont understand why it was wrong sir Infact im actually confused with c being the correct answer I remember something that material requistion notes only record quantities and not price so why would anyone charge a cost from using the material requistion note The material requistion note only gives the quantity asked from the stores department by the manufacturing department the purchase order on the otherhand tells you how much we actually bought the materials for from the supplier Sir please help me out with this confusion