राज्याच्या मुख्य सचिवाचे खालीलपैकी कोणते कार्य चुकीचे आहे ?

The correct answer is Option C (He acts as the Chairman by rotation, of the Zonal Council of which the state concerned is a member.).

Key Points:
• Role and Functions of the Chief Secretary:
• Statement (1): The Chief Secretary is the chief advisor to the Chief Minister in all administrative and policy matters (Correct).
• Statement (2): Under President's Rule (Article 356), if the Centre does not depute advisors, the Chief Secretary functions as the principal advisor to the Governor (Correct).
• Statement (4): The Chief Secretary chairs inter-departmental coordination committees to resolve bureaucratic conflicts (Correct).
• Statement (3): Under the States Reorganisation Act 1956, the Union Home Minister is the common Chairman of all Zonal Councils. The Chief Ministers of member states act as Vice-Chairman by annual rotation. The Chief Secretaries act only as Secretary/advisors to the council by rotation, NOT the Chairman (Incorrect).
• Hence, statement (3) is incorrect and is the correct answer.
• Key Takeaway: The Union Home Minister is Chairman of Zonal Councils; Chief Secretaries act only as rotating secretaries/advisors, not chairpersons.