Step 1: Understanding the Question.
This question asks us to spot the outsourcing tie-up that does not belong on a list of genuine billion-dollar deals struck by Indian IT majors in the mid-2000s.
Step 2: Key Formula or Approach.
Since this is a memory-based current-affairs question, the way to solve it is to recall each named partnership and check whether it corresponds to a real, well-reported multi-year, billion-dollar contract.
Step 3: Detailed Explanation.
TCS-Nielsen: Tata Consultancy Services signed a large, long-term technology and business process outsourcing agreement with the market research firm Nielsen, a deal reported to be worth well over a billion dollars across its term.
Tech Mahindra-BT: Tech Mahindra itself grew out of a joint venture with British Telecom (BT), and BT remained its largest client for years, with contract values running into billions of dollars cumulatively.
IBM-Bharti: IBM signed a landmark ten-year deal with Bharti Airtel to manage its IT infrastructure, a contract widely reported at roughly a billion dollars.
Infosys-BN AM O: this pairing does not correspond to any confirmed, widely reported billion-dollar contract between Infosys and a company matching that name. Compared with the other three, well-documented deals, this entry does not hold up.
Step 4: Final Answer.
Since TCS-Nielsen, Tech Mahindra-BT, and IBM-Bharti are all real, well-known billion-dollar engagements while the Infosys pairing is not, option (C) is the one that is not a genuine billion-dollar deal.