पुढील कोणते विधान अयोग्य आहे ?

The correct answer is Option C (Deputy Chairman may be removed from his office by a resolution of the council passed only by two thirds majority of the council.).

Key Points:
• Article 90 of the Constitution: Deals with the vacation, resignation, and removal from office of the Deputy Chairman of the Rajya Sabha.
• Removal Majority (Statement 3): Under Article 90(c), the Deputy Chairman may be removed by a resolution passed by a majority of all the then members of the Council (an absolute majority of the House), not a two-thirds majority. This makes statement (3) incorrect.
• Other Valid Provisions: The Deputy Chairman must vacate office if he ceases to be a member of the Rajya Sabha (Article 90a), can resign anytime by writing to the Chairman (Article 90b), and moving a removal resolution requires at least 14 days' advance notice (Article 90 proviso).
• Conclusion: Statement (3) contains the incorrect majority requirement.
• Key Takeaway: The Deputy Chairman of Rajya Sabha can be removed by an absolute majority of all then members, not a two-thirds majority.