The correct option is The science of measurement.
Explanation
Al-Biruni’s Kitab-ul-Hind (also known as Tahqiq-i-Hind) is an encyclopedic work written in Arabic in the 11th century. It provides a comprehensive account of Indian civilization, covering diverse subjects such as religion, philosophy, festivals, astronomy, alchemy, manners and customs, social life, laws, and metrology.Analysis:
- Metrology: This term refers to the scientific study of measurement. In Kitab-ul-Hind, Al-Biruni dedicated specific chapters to the Indian systems of weights, measures, distances, and timekeeping. He meticulously compared these Indian units with those used in the Islamic world and ancient Greece.
- Distinction from other terms:
- Meteorology: The study of the atmosphere and weather patterns (Option d).
- Metallurgy: The science and technology of extracting metals (Option c).
- Astronomy: The study of celestial bodies (Option b), which Al-Biruni also covered extensively but is distinct from metrology.
Key Takeaway:
In the context of Al-Biruni’s work, metrology deals strictly with the science of measurement (weights, measures, and scales), distinct from meteorology (weather) or metallurgy (metals).