A commodity market has a _________ structure, if there is one seller of the commodity, the commodity has no substitute, and entry into the industry by another firm is prevented.
In April 2017, on the birth anniversary of Dr. B. R. Ambedkar which body announced the winners of Lucky Draw Schemes like ‘Lucky Grahak Yojana’ and ‘Digi-Dhan Vyapar Yojana’?