Correct Option: C

In 2007, Novelis was acquired by Hindalco Industries Limited, another veteran of the aluminium business. Hindalco is the flagship company of the Aditya Birla Group of companies, a multinational conglomerate headquartered, in Mumbai. Following the merger, Novelis became a wholly owned subsidiary of Aditya Birla Group. With the addition of Novelis, Hindalco became the world's largest aluminium rolling company and one of the biggest producers of primary aluminium in Asia.