Civil Services Examination · প্রশ্ন 33
Indigo cultivation in India declined by the beginning of the 20th century because of
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (B) its unprofitability in the world market because of new inventions
ব্যাখ্যা
The invention of synthetic indigo (Germany, late 1890s) made natural indigo unprofitable.