Explanation:

Statement 1 is correct: Most of the Harappan settlements had a small high western part and a larger lower eastern section, but there were variations: - Sites such as Dholavira and Lothal (Gujarat), the entire settlement was fortified, and sections within the town were also separated by walls. - The Citadel within Lothal was not walled off, but was built at a height. Statement 2 is incorrect: Important features of the Great Bath discovered at Mohenjo-Daro: • There was a large rectangular tank in the courtyard, surrounded on all four sides by Corridors. • Two flights of steps in the north and south, leading into the tank. • The tank was made watertight by setting bricks on edge, - Rooms on three sides, one of which had a well. -Smaller building towards the north, with eight Bathrooms, four on either side of the corridor. -Scholars suggest that it might have been used for some kind of ritual bath. Statement 3 is correct: In the Indus Valley Civilization, Harappa was the first site to be discovered, in 1921, by Dayaram Sahni, an Indian archaeologist. Rai Bahadur Dayaram Sahni was also the first archaeologist to be appointed DirectorGeneral of the Archaeological Survey Of India.