Final answer:
Sharon Osbourne has not been a host on 'The View'; she is known for her work on a different talk show, 'The Talk'. The other listed personalities have all been hosts on 'The View'.
Step-by-step explanation:
The question asks about the hosts of the television talk show The View. Out of the options provided, Sharon Osbourne has NOT been a host on The View. Rosie O'Donnell, Jenny McCarthy, and Meredith Vieira have all served as hosts at various times since the show's inception in 1997. Sharon Osbourne, however, is known for being a host on a different talk show, The Talk, which is often considered a competitor to The View. The correct answer to who has not been a host on The View is Sharon Osbourne (option b).