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