Which of the following states share boundary with Bhutan?1West Bengal and Sikkim2Sikkim, Assam and Arunachal Pradesh3West Bengal, Sikkim, Assam and Arunachal Pradesh4West Bengal, Sikkim, and Arunachal PradeshAnswer & explanation+Correct answer: option 3West Bengal, Sikkim, Assam and Arunachal Pradesh share their boundaries with Bhutan.