The notion of saptanga, as introduced in Arthashastra, includes the following aspects:

Option 1: Kings, territory, administration, and treasury. This option is correct. Saptanga refers to the seven limbs or elements of the state. These include the king, who is the ruler or sovereign power; the territory, which represents the physical boundaries of the state; the administration, which involves the management and organization of the government; and the treasury, which deals with the financial resources and economy of the state. These four elements are crucial in understanding the functioning of a state.

Option 2: Music, dance, ragas, and wrestling. This option is incorrect and unrelated to the concept of saptanga in Arthashastra. Music, dance, ragas, and wrestling are not part of the seven limbs described in the text.

Option 3: Ministers, civil servants, subalterns, and those involved in espionage. This option is incorrect. While ministers and civil servants might be involved in the administration aspect of the state (one of the saptanga), subalterns and those involved in espionage are not explicitly mentioned in the concept of saptanga.

Option 4: Aristocrats, acharyas, traders, and monks.