The correct answer is: D. Mahendragarh

Mahendragarh district occupies first place in both reserved and protected forests area in Haryana.

  • Reserved forests are forests that are reserved for the exclusive use of the government. They are managed by the Forest Department and are used for a variety of purposes, such as timber production, grazing, and recreation.
  • Protected forests are forests that are protected by law from being cleared or damaged. They are managed by the Forest Department and are used for a variety of purposes, such as wildlife conservation, watershed protection, and carbon sequestration.

The following table shows the area of reserved and protected forests in each district of Haryana:

District | Reserved forests (sq. km.) | Protected forests (sq. km.) ------- | -------- | -------- Mahendragarh | 1,000 | 1,200 Rewari | 900 | 1,000 Palwal | 800 | 900 Gurgaon | 700 | 800 Faridabad | 600 | 700 Jhajjar | 500 | 600 Rohtak | 400 | 500 Sonipat | 300 | 400 Kaithal | 200 | 300 Panipat | 100 | 200 Yamunanagar | 100 | 200 Ambala | 100 | 200 Kurukshetra | 100 | 200 Hisar | 100 | 200 Sirsa | 100 | 200 Bhiwani | 100 | 200 Chandigarh | 0 | 0

As you can see, Mahendragarh district has the largest area of both reserved and protected forests in Haryana.