The Math (Monastery), which was rejuvenated and chosen as main center by Baba Mastnath, was :

Question

Accepted Answer

Explanation:

1. **Justification for Option 2 (Asthal Bohar):**
   - Asthal Bohar is a significant and historical monastery located in the Rohtak district of Haryana, India. It is renowned for its spiritual and cultural heritage and has been a center of Nath sect activities for centuries.
   - Baba Mastnath, a revered saint and spiritual leader, played a crucial role in rejuvenating Asthal Bohar. He chose it as the main center for his spiritual and social activities, thereby enhancing its prominence and influence.
   - The monastery has been a hub for religious teachings, meditation, and community service under the guidance of Baba Mastnath and his successors. It continues to be an important spiritual center in the region.

2. **Explanation for why other options are incorrect:**

- **Option 1 (Kansrati):**
     - Kansrati is not historically recognized as a significant center associated with Baba Mastnath. There is no substantial evidence or historical record indicating that Baba Mastnath rejuvenated or chose Kansrati as his main center.
   
   - **Option 3 (Pehwa):**
     - Pehwa, while being a location of some religious importance, does not have a direct connection with Baba Mastnath in terms of being rejuvenated or chosen as a main center by him. It lacks the historical association with Baba Mastnath that Asthal Bohar holds.
   
   - **Option 4 (Jalandhar):**
     - Jalandhar is a major city in Punjab, but it is not linked to Baba Mastnath in the context of being a rejuvenated monastery or a main center. The historical and spiritual significance of Asthal Bohar under Baba Mastnath's influence is not paralleled by Jalandhar in this context.

In conclusion, Asthal Bohar stands out as the correct answer due to its historical and spiritual significance as the main center rejuvenated by Baba Mastnath, making Option 2 the correct choice.