a) Most Harappan sites are located in semi-arid Lands.
b) Shortughai in Afghanistan is a Harappan site.
c) Both (a) and (b) are correct.
d) Both (a) and (b) are incorrect
Most Harappan sites are located in semi-arid lands, where irrigation was probably required for agriculture. Traces of canals have been found at the Harappan site of Shortughai in Afghanistan, but not in Punjab or Sind.