On the supply side, recent speculation that Russia might be willing to cooperate with the Organization of the Petroleum Exporting Countries (OPEC) to curb output in support of prices was given a blow on Monday after the chief executive of Russian oil major Rosneft ruled out a Russian cut.
Utilize the input text as a context reference, choose the right relationship between 'Rosneft' and 'Petroleum' from the options.
Options: member of, product/material produced, parent organization, publisher