Identify the statements about the High Court judges that are correct. P: A judge of a High Court cannot be removed from office on any ground. Q: A Judge who has worked as a permanent Judge of a High Court cannot practise in any Court after his/her retirement. R: The salaries and allowances of the Judges of a High Court cannot be changed to their disadvantage during the course of their service. S: A Judge of a High Court may resign his/her office by writing, addressed to the President of India.