Step 1: Constitutional process.
Article 61 provides for impeachment of the President by Parliament for “violation of the Constitution.” The charge must be preferred by either House and investigated; removal requires a special majority in {both} Houses.
Step 2: Why others are wrong.
PM/CJI have no such power; the Lok Sabha alone cannot remove—the Rajya Sabha must also concur with the prescribed majority.
Step 3: Conclude.
\[
\boxed{\text{Parliament (both Houses) removes the President via impeachment (Option D).}}
\]