Which of the following is not done by the NNPC?

The option that is not done by the NNPC is "Pricing of crude oil". The NNPC (Nigerian National Petroleum Corporation) is a government-owned oil company in Nigeria responsible for the management of the country's oil and gas resources. The NNPC is involved in the production, refining, exploration, and exploitation of crude oil, but it is not responsible for the pricing of crude oil. The pricing of crude oil is determined by the global market forces of supply and demand, and it is influenced by factors such as production levels, geopolitical events, and economic conditions. While the NNPC may sell crude oil at a negotiated price to buyers, it does not control the global market price of crude oil. Therefore, the correct option is "Pricing of crude oil".