The dream that is not for a character in the options given is:
b. Walter: own a liquor store.
All of the other options represent dreams for the characters in the play "A Raisin in the Sun" by Lorraine Hansberry. Ruth's dream is to keep the family together, Beneatha wants to become a doctor, Travis dreams of going to college, and Mama's dream is to own a home for her family. However, Walter's dream is to own a liquor store, which causes conflict within the family as they have different ideas about how to use the money they receive.