Consider the following statements.

1. The persons holding military posts or civil posts under the Centre hold office during the pleasure of the president.

2. A civil servant cannot be dismissed or removed by an authority subordinate to that by which he was appointed.

3. A civil servant cannot be dismissed or removed or reduced in rank except after an inquiry in which he has been informed of the charges against him and given a reasonable opportunity of being heard in respect of those charges.

Which of the statements given above is/are correct?