Explanation:

All of the above statements are correct.

• The Collegium of the Supreme Court consists of 5 senior most Judges including the Chief Justice of India. They will consider the elevation of Chief Justices/Judges of High Court to Supreme Court, elevation of Judges of High Courts as Chief Justices and elevation of Judges. In case of difference of opinion, the majority view will prevail. Since Constitution mandates consultation with the Chief Justice of India is necessary for appointments to judiciary, the collegium model evovled.
• Article 222 of the Constitution provides for the transfer of a judge from one High Court to another.
• Yes, the Collegium also recommends the transfer of Chief Justices and other judges.

Hence option 4th is correct.