Option a is the correct answer. Aprahat was one of the 12 types of land that was classified depending on soil fertility, irrigation, and physical features of the land. Aprahat was basically referred to as woodland or field with thick and dense shrubs and trees. Information about Aprahat can be found in Amarakosha written by Amarsimha (one of the courtiers of Chandragupta II of the Gupta dynasty). The other types of land were Kshetra (cultivable land), Khila (wasteland), Vasti (habitable land), Gapata Sarah (pasture land), etc.