Shina is a major language spoken in:

The correct answer is: b) Ladakh.

Shina is a Dardic language spoken in the Ladakh region of India and the Gilgit-Baltistan region of Pakistan. It is also spoken in some parts of Afghanistan and Tajikistan. Shina is the native language of the Shina people, who are a Muslim ethnic group living in the Ladakh region. Shina is a member of the Indo-Aryan language family, and it is closely related to the Kashmiri language. Shina is written in the Sharada script, which is a Brahmic script.

The other options are incorrect because:

• Jammu region is a region in the Indian state of Jammu and Kashmir. The main languages spoken in Jammu region are Dogri, Punjabi, and Hindi.
• Kashmir Valley is a valley in the Indian state of Jammu and Kashmir. The main languages spoken in Kashmir Valley are Kashmiri, Urdu, and Dogri.
• Gilgit-Baltistan is a region in the northern part of Pakistan. The main languages spoken in Gilgit-Baltistan are Shina, Balti, and Burushaski.