Correct option is A
The correct option is (iv), (i), (ii), (iii).
Information Booster
The Harappan sites are arranged chronologically based on when their initial excavations began:
Harappa (iv): Excavations began in 1921, led by Daya Ram Sahni.
Lothal (i): The site was discovered in 1954, and excavations began in 1955.
Kalibanga (ii): The site was discovered by A. Ghosh in 1953, and a major phase of excavation was conducted by B.B. Lal and B.K. Thapar starting in 1961.
Dholavira (iii): The site was discovered in 1967-1968, but large-scale excavations did not begin until 1990, led by R. S. Bisht.