Question. Context: The PAC is formed every year with a strength of not more than 22 members of which 15 are from Lok Sabha, the lower house of the Parliament, and 7 from Rajya Sabha, the upper house of the Parliament. The term of office of the members is one year. The Chairman is appointed by the Speaker of Lok Sabha. Since 1967, the chairman of the committee is selected from the opposition. Earlier, it was headed by a member of the ruling party. Its chief function is to examine the audit report of Comptroller and Auditor General (CAG) after it is laid in the Parliament. CAG assists the committee during the course of investigation. None of the 22 members shall be a minister in the government.

Question: who appoints the chairman of public accounts committee?
Answer. the Speaker of Lok Sabha
What step-by-step reasoning justifies that answer?
Reasoning: To answer this question, we should know that: The Chairman is appointed by the Speaker of Lok Sabha.