Explanation:

A Joint Parliamentary Committee (JPC) is set up to examine a particular bill presented before the Parliament, or for the purpose of investigating cases of financial irregularities in any government activity.

• The JPC is an ad-hoc body.
• It is set up for a given period of time and is aimed at addressing a specific issue.

Composition

• In order to set up a JPC, a motion is passed in one House and supported by the other House.
• The committee’s members are decided by Parliament.
• The number of members can vary. There are twice as many Lok Sabha members as the Rajya Sabha.

Powers and Functions

• A JPC is authorised to collect evidence in oral or written form or demand documents in connection with the matter.
• The proceedings and findings of the committee are confidential, except in matters of public interest.
• The government can take the decision to withhold a documentif it is considered prejudicial to the safety or interest of the State.
• The Speaker has the final word in case of a dispute over calling for evidence.
• The committee can invite interested parties for inquiry and summon people to appear before it.
• The committee gets disbanded following the submission of its report to Parliament.

Hence all statements are correct.