Step 1: Understanding the Question:
The question asks about the origin and nature of the office of the Comptroller and Auditor General (CAG) of India, specifically whether it is a constitutional body or created by other branches of government.
We need to determine which authority created this independent auditing position.
Step 2: Key Principle / Approach:
An authority is classified as "constitutional" if it is directly established by the provisions of the Constitution of India, rather than by an act of Parliament or executive order.
Step 3: Detailed Explanation:
• The CAG of India is the guardian of the public purse and heads the Indian Audit and Accounts Department.
• Article 148 of the Constitution of India provides for an independent office of the Comptroller and Auditor General of India.
• The CAG is appointed by the President of India by warrant under his hand and seal.
• Since this office is established directly by the text of the Constitution under Part V, Chapter V, it is a constitutional authority.
• It is not a statutory body created by a parliamentary act (such as the Lok Sabha or Rajya Sabha alone), nor is it a judicial creation of the Supreme Court, making options (B), (C), and (D) incorrect.
• The duties and powers of the CAG are further elaborated under Article 149 and the CAG (Duties, Powers and Conditions of Service) Act, 1971.
• The independence of the CAG is safeguarded by constitutional provisions, such as security of tenure (removable only in a manner similar to a Supreme Court judge) and the fact that their salary and administrative expenses are charged to the Consolidated Fund of India.
Step 4: Final Answer:
The office of the CAG is a constitutional authority created directly by the Constitution, corresponding to Option (A).