The Belwa dag village in Ranchi district is known to be part of

The correct answer is: A. Parasnath hill

Belwa dag village is located in the Parasnath hill range in Ranchi district. The Parasnath hill range is a sacred place for Jains, as it is the site of several Jain temples and monasteries. The hill is also home to the Parasnath temple, which is one of the most important Jain temples in India.

The other options are incorrect because:

• B. Centre of Jainism is incorrect because the Belwa dag village is not a centre of Jainism.
• C. Jehagarh is incorrect because the Belwa dag village is not located in Jehagarh.
• D. Buddha Vihar is incorrect because the Belwa dag village is not a Buddhist site.