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<!DOCTYPE html> <html> <head> <style> option:disabled { background: red; } </style> </head> <body> <select> <option value="volvo">Volvo</option> <option value="saab" disabled>Saab</option> <option value="opel">Opel</option> <option value="audi" disabled>Audi</option> <option value="bmw">BMW</option> </select> </body> </html>