The Yangtse region, recently seen in the news, is located in Arunachal Pradesh. Arunachal Pradesh is a state in northeastern India, bordered by Bhutan to the west, China to the north, and Myanmar to the east. It is a region of immense natural beauty, with breathtaking landscapes, snow-capped mountains, and rich biodiversity.

Here is a detailed explanation of why the correct answer is option C (Arunachal Pradesh):

1. Location of Arunachal Pradesh:
- Arunachal Pradesh is situated in the easternmost part of India, in the northeastern region.
- It shares its border with China (Tibet Autonomous Region) to the north and northeast, making it a strategically important state.
- The Yangtse region, which has been in the news, is located within Arunachal Pradesh.

2. Significance of the Yangtse region:
- The Yangtse region is of great strategic importance due to its proximity to the Chinese border.
- It is situated in the eastern part of Arunachal Pradesh, close to the Line of Actual Control (LAC) that separates India and China.
- The region has witnessed heightened tensions between the Indian and Chinese armies in recent times.

3. Border disputes between India and China:
- India and China have a long-standing border dispute in the region, with both countries claiming territories in Arunachal Pradesh.
- China claims the entire state of Arunachal Pradesh as part of its territory and refers to it as "South Tibet."
- The border dispute between the two countries has led to occasional standoffs and tensions in the region.

4. Importance of the region for India:
- Arunachal Pradesh is strategically important for India due to its location.
- It serves as a buffer state between India and China, providing a protective barrier for the rest of the country.
- The region is also rich in natural resources, including hydropower potential, which makes it economically significant.

In conclusion, the Yangtse region, which has been in the news, is located in Arunachal Pradesh. The region holds strategic importance due to its proximity to the Chinese border and the ongoing border disputes between India and China. Arunachal Pradesh, as a whole, is a beautiful state in northeastern India, known for its stunning landscapes and rich biodiversity.