The correct answer is (a) The Committee on Public Accounts.
The Committee on Public Accounts is the largest committee of the Parliament. It is a standing committee of the Lok Sabha, the lower house of the Parliament of India. The committee is responsible for examining the accounts of the Union Government and its subordinate offices. It also examines the reports of the Comptroller and Auditor General of India.
The Committee on Public Accounts is composed of 22 members, 11 from the Lok Sabha and 11 from the Rajya Sabha, the upper house of the Parliament. The chairman of the committee is a member of the Lok Sabha.
The Committee on Public Accounts meets at least once a month. It also holds public hearings to examine the accounts of the government. The committee submits its reports to the Parliament every year.
The Committee on Public Accounts is an important committee of the Parliament. It plays a vital role in ensuring that the government is accountable for its spending.
The other options are incorrect because they are not the largest committees of the Parliament.
(b) The Committee on Estimates is a standing committee of the Lok Sabha. It is responsible for examining the estimates of expenditure of the Union Government.
(c) The Committee on Public Undertakings is a standing committee of the Parliament. It is responsible for examining the functioning of public undertakings.
(d) The Committee on Petitions is a standing committee of the Parliament. It is responsible for examining petitions received by the Parliament.