The correct option is B 3000-1500 B.C.
Indus valley civilisation identified as urban settlement is believed to flourish during 3000-1500 BC. It's chief characteristics were permanent settlement and practice of settled agriculture, Trade was a prominent feature of its urban areas. Their accomplishment in art and culture ia also to be noted. This whole Indus valley civilisation can be divided into Early, Mature and later phases given their progress and expanse.