Answer: (Detailed Solution Below)
Option B: Jammu and Kashmir
Detailed Solution:
The correct answer is “Jammu and Kashmir”.
Jammu and Kashmir was a party to the Stand-Still Agreement.
This agreement was signed between the newly independent India and Pakistan and the princely state of Jammu and Kashmir to maintain the status quo in matters of communication, trade, and other essential services until a final decision on the state's accession was made.