<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
S1: UPSC conducts Civil Services Examination;
S2: UPSC stands for Union Public Service Committee;
S3: The President of India appoints the UPSC chairman and its members;
S4: Civil Services Examination is conducted to select candidates for the post of IPS and IAS.
Select which of the above statements is/are correct.