Answer: both internal and external inventories
Explanation: In simple words, supply chain inventories refers to the raw material, finished goods and work in process inventories like factors that together constitutes a supply chain.
Management of supply chain refers tot he process in which the organisation tries to control and maintain the flow of inventories from on stage to the other with the ultimate objective of keeping the supply of finished goods smooth throughout the period.
It starts from procuring the suitable raw materials in right quantity and right time after that it monitors the manufacturing unit so that production is done in appropriate time period and finally makes sure that finished goods will be supplied to the market as per the time period specified by the wholesalers or retailers.