Who among the following can never win the Nobel Prize?

The Nobel Prizes are awarded in the fields of Physics, Chemistry, Physiology or Medicine, Literature, Peace, and Economic Sciences. The categories you’ve listed include individuals who can potentially win Nobel Prizes: Writer (Literature), Medical Doctor (Physiology or Medicine), Economist (Economic Sciences), and Physicist (Physics). However, World Famous Musician is not a distinct category for a Nobel Prize. The closest equivalent would be the Nobel Prize in Literature, which can be awarded to authors, poets, and playwrights. Musicians, unless they are also recognized for their literary contributions, would not typically be eligible for a Nobel Prize.