Clean, pressed khaki trousers and clean, wrinkle-free polo shirt would be most appropriate for the workplace because they present a professional and polished appearance. Trousers are typically more formal than jeans, and khaki is a neutral color that is commonly accepted in professional settings. A polo shirt is a comfortable yet professional option that can be easily paired with trousers. Both options demonstrate cleanliness and attention to detail, which are important in a workplace environment.