The migration of Mizo tribes into the present-day Mizoram region likely occurred:

In a single wave of migration
Over centuries in multiple waves
Very recently during the British period
During the early medieval period (500-1000 CE)

The correct answer is: b) Over centuries in multiple waves.

The Mizo people are an ethnic group native to the northeastern Indian state of Mizoram. They are believed to have migrated to the region from the Yunnan province of China in multiple waves over a period of several centuries. The first wave of migration is thought to have occurred in the 13th century, followed by a second wave in the 16th century and a third wave in the 18th century. The Mizo people are a matrilineal society, meaning that property and inheritance are passed down through the female line. They are also a Christian people, with the majority of Mizo belonging to the Presbyterian Church.

The following are brief explanations of each option:

a) In a single wave of migration: This option is incorrect because the migration of Mizo tribes into the present-day Mizoram region likely occurred over centuries in multiple waves.
b) Over centuries in multiple waves: This option is correct because the migration of Mizo tribes into the present-day Mizoram region likely occurred over centuries in multiple waves.
c) Very recently during the British period: This option is incorrect because the migration of Mizo tribes into the present-day Mizoram region likely occurred over centuries in multiple waves, long before the British period.
d) During the early medieval period (500-1000 CE): This option is incorrect because the migration of Mizo tribes into the present-day Mizoram region likely occurred over centuries in multiple waves, beginning in the 13th century.