Several factors fueled the secessionist movement in the Mizo Hills (present-day Mizoram):
1. Government Neglect: Mizo people perceived a lack of attention from the Indian government, particularly concerning regional development and their requests for autonomy.
2. Economic Hardship: Widespread poverty, underdevelopment, and insufficient basic infrastructure fostered discontent, prompting demands for independence from India.
3. Insurgency and Armed Conflict: The Mizo National Front (MNF) initiated an armed rebellion against the Indian government, lasting from 1966 to 1986. The movement aimed to establish an independent Mizo nation but was ultimately suppressed by the Indian military.
4. Peace Accord and Statehood: Following prolonged conflict, the Mizo Peace Accord was finalized in 1986, culminating in the establishment of Mizoram as a full state within India.
Consequently, the correct option is (a).