The Comptroller and Auditor General (CAG) of India is a constitutional body that plays a critical role in the Indian Polity. The three main functions of CAG in Indian Polity are as follows:

• Financial audits: CAG conducts financial audits of all government departments and public sector undertakings, ensuring that public funds are utilized efficiently and effectively. This includes auditing the receipts and expenditure of the government, verifying the compliance of the government with various laws and regulations, and making recommendations for improvements.
• Performance audits: CAG also conducts performance audits of government programs and schemes, assessing their effectiveness, efficiency, and economy. This helps identify areas for improvement and ensures that the government is accountable for the outcomes of its programs and policies.
• Role in the Parliament: CAG plays a pivotal role in the Indian Polity by presenting its audit reports to the Parliament, which enables the legislators to scrutinize the government's finances and hold it accountable for its actions. CAG reports provide valuable insights into the government's functioning and contribute to the overall transparency and accountability of the Indian polity.

Thus, CAG's role in the Indian Polity is crucial for maintaining the financial integrity of the government and ensuring that public funds are utilized effectively.