Who is the Chief Minister of Tamil Nadu as of July 2023?

The correct answer is MK Stalin.

Step-by-step Explanation:

1. Identify the position and location: The question asks for the Chief Minister of the Indian state of Tamil Nadu.

2. Determine the relevant time period: The question specifies the timeline as of July 2023.

3. Evaluate the options:
- KN Nehru: He serves as a minister (Municipal Administration) in the Tamil Nadu government, not the Chief Minister.
- Pinarayi Vijayan: He is the Chief Minister of Kerala.
- M Yediyurappa: He is a political leader from Karnataka and a former Chief Minister of Karnataka.
- MK Stalin: Muthuvel Karunanidhi Stalin (M. K. Stalin) assumed office as the Chief Minister of Tamil Nadu on May 7, 2021, and continues to hold the position as of July 2023.

Therefore, MK Stalin is the Chief Minister of Tamil Nadu as of July 2023.