Choose the word whose part underlined part is prounced differtly from the other

choose the word whose part underlined part is prounced differtly from the other ;
1 A. experience    B except       C excellent        D exchange    ; tu gach chan e 
2. A union   B unit    C until            D university          ; tu gach chan u 
3. A campus   B locate C relax  D   fashion;   tu gach chan la a