The correct answer is (a) Ramgarh.
Ramgarh is a town and a nagar panchayat in Nainital district in the Indian state of Uttarakhand. It is located in the Kumaon region of the state. The town is known for its scenic beauty and its proximity to the Nainital Lake.
The first Magnesite factory in Uttarakhand was established in Ramgarh in 1962. The factory is owned and operated by the National Mineral Development Corporation (NMDC). The factory produces magnesite, which is a mineral used in a variety of industries, including the steel, chemical, and refractory industries.
The other options are incorrect. Gangolihat is a town in Chamoli district in the Indian state of Uttarakhand. Chamba is a town in Tehri Garhwal district in the Indian state of Uttarakhand. Jhiroli is a town in Chhattisgarh, India.