Utilize the input text as a context reference, choose the right relationship between 'iPhone' and 'Apple Inc' from the options.
Options: owner of, employer, business division, developer

The housing index (.HGX) rose 1.64 percent on the data, outperforming the overall stock market, which fell after Apple Inc (AAPL.O) late on Tuesday gave a fourth-quarter revenue forecast that fell short of estimates and missed some targets for iPhone sales.
developer