Aramco, a oil producing gaint of Saudi Arabia is going to buy 20% of the stake of oil amd petrochemical business of which of the following companies?

Speaking at RIL's 42th annual general meeting on Monday, Chairman Mukesh Ambani announced that Aramco has agreed to take a 20 per cent stake in the company's oil refinery and chemical business at an enterprise value of $75 billion (around Rs 5.32 lakh crore). This is among the largest foreign investments in India.