Step 1: Understanding the question.
Garampani Sanctuary is a wildlife sanctuary located in the state of Assam, India.
Step 2: Analyzing the options.
(A) Junagarh, Gujarat: Junagarh is a place in Gujarat, but Garampani Sanctuary is not located there.
(B) Diphu, Assam: Correct — Garampani Sanctuary is located in Diphu, Assam, known for its hot springs.
(C) Kohima, Nagaland: Kohima is in Nagaland, but it is not the location of Garampani Sanctuary.
(D) Gangtok, Sikkim: Gangtok is the capital of Sikkim but does not host Garampani Sanctuary.
Step 3: Conclusion.
The correct answer is (B) Diphu, Assam, as Garampani Sanctuary is located in Assam.