Step 1: Recall why removal is hard.
To keep judges independent, the Constitution gives them security of tenure, so they cannot be removed easily.
Step 2: Find the relevant Articles.
Article 217 covers High Court judges, and it says they are removed like Supreme Court judges under Article 124(4).
Step 3: Know the only grounds.
A judge can be removed only for proved misbehaviour or incapacity. No other reason is allowed.
Step 4: Test the options.
Contempt of court, holding an office of profit, and non-application of mind are not constitutional grounds for removal. Only proved misbehaviour fits.
Answer: Proved misbehaviour (Option 1).