The maximum age limit for physically challenged candidates in the UPSC examination is generally 40 years, with certain relaxations applicable for different categories. This provision aims to ensure inclusivity and provide equal opportunities for candidates who may face additional challenges due to their disabilities. However, it is essential for candidates to check the specific notifications for any updates or changes in age limits, as different categories and considerations may apply. Such policies reflect the UPSC's commitment to promoting diversity and enabling deserving candidates to pursue a career in civil services without age-related disadvantages.