The 1ST meridian 821/2°E passes through four states in India. The correct set of states is given in option 4, which includes Uttar Pradesh, Odisha, Andhra Pradesh, and Chhatisgarh.

To understand why this is the correct answer, it is important to know what the meridian is. A meridian is a line of longitude that runs from the North Pole to the South Pole and divides the Earth into Eastern and Western Hemispheres. The 1st meridian 821/2°E is a specific line of longitude that passes through these four states in India.

Option 1 is incorrect because it includes Uttarakhand instead of Odisha. Option 2 is incorrect because it includes Jharkhand instead of Odisha. Option 3 is incorrect because it includes Madhya Pradesh instead of Odisha. Therefore, option 4 is the correct answer.

It is important to note that the meridian does not pass through the entire state of Uttar Pradesh or Chhatisgarh. It only passes through a certain portion of these states.