In medieval India, the process of indigo extraction underwent great improvement as a result of the: / 2025, CDS I / By allpyq CDS I 2025 Question In medieval India, the process of indigo extraction underwent great improvement as a result of the:A. Use of fertiliser enhancing the quality of indigo crop.B. Introduction of mechanical crushing tools for indigo stems.C. Use of gypsum and lime mortars in making the inner surfaces of indigo vats waterproof.D. Employment of slave labour in quick distilling of indigo curcibles.Correct Answer: Option B Visit http://www.allpyq.com