Answer & ExplanationAnswer: [A]
The Arab traveler whose work is considered as the mirror of the 11th century is Alberuni. Alberuni was a renowned scholar, historian, and traveler from Central Asia who visited the Indian subcontinent during the 11th century. He extensively documented his observations, experiences, and studies in his work titled "Kitab al-Hind" (Book of India). This work provides valuable insights into various aspects of Indian society, culture, religion, science, and philosophy during that time period, making it an important historical and cultural reference for understanding the 11th century in India.