India holds a monopoly in production of ____ in the world.

✅Explanation:
India has a near monopoly on the production of Isabgol, also known as psyllium husk. Isabgol is a fiber derived from the Plantago ovata plant, primarily grown in western India. This husk is used for its medicinal properties, particularly as a laxative and dietary fiber supplement.

📌Other Options:
• Musk: Musk is a fragrant substance traditionally obtained from deer glands. Due to ethical concerns, synthetic musk is now more commonly used. Production of musk is not limited to a single country.
• Khus grass: Khus grass (Vetiveria zizanioides) is an aromatic grass native to tropical regions of Asia. While India is a major producer of Khus grass, it doesn't hold a monopoly on its production.
• Periwinkle: Periwinkle (Catharanthus roseus) is a flowering plant native to Madagascar. It is cultivated worldwide as an ornamental plant and for its medicinal properties. Periwinkle production is not limited to one country.

🛑 Related Terminology:
• Monopoly: A situation where one supplier controls the entire market for a particular good or service.
• Psyllium husk: The outer layer of the Plantago ovata seed, used as a dietary fiber supplement and laxative.
• Medicinal properties: Qualities of a plant or substance that can be used to treat or prevent disease.