Explanation:

Union Public Service Commission is a constitutional body.

A quasi-judicial body is an entity such as an arbitrator or tribunal board, generally of a public administrative agency, which has powers and procedures resembling those of a court of law or , and which is obliged to objectively determine facts and draw conclusions from them so as to provide the basis of an official action. Such actions are able to remedy a situation or impose legal penalties, and may affect the legal rights, duties or privileges of specific parties. Some examples of quasi-judicial bodies are :-
1.National Human Rights Commission
2.State Human Rights Commission (established at each state)
3.Central Information Commission
4.State Information Commission (established at each state)
5.National Consumer Disputes Redressal Commission
6.State Consumer Disputes Redressal Commission (established at each state)
7.Competition Commission of India
8. Appellate Tribunal for Electricity
9. Railway Claims Tribunal
10.Income Tax Appellate Tribunal
11.Intellectual Property Appellate Tribunal
12.Central Excise and Service Tax Appellate Tribunal
13.Banking Ombudsman
14.Income tax Ombudsman