Who among the following cabinet ministers was appointed as the Governor of Karnataka in July 2021?

The correct option is Thawarchand Gehlot.

In July 2021, Thawarchand Gehlot, who was serving as the Union Minister for Social Justice and Empowerment in the Cabinet, was appointed as the Governor of Karnataka.

Additional Context on Options:

1. Thawarchand Gehlot: Appointed as the Governor of Karnataka in July 2021.
2. Hari Babu Kambhampati: Appointed as the Governor of Mizoram in July 2021.
3. Rajendra Vishwanath Arlekar: Appointed as the Governor of Himachal Pradesh in July 2021.
4. Arjun Munda: Continued serving as the Union Minister for Tribal Affairs.