Q. Central Seed Testing and Referral Laboratory (CSTL) is located at:
Answer: Varanasi
Notes: The Central Seed Testing and Referral Laboratory (CSTL) is located in Varanasi, Uttar Pradesh. Established to ensure seed quality and promote agricultural productivity, CSTL plays a crucial role in seed testing and certification in India. Varanasi, known for its rich cultural heritage, is also a important center for agricultural research and development.