What issue related to voters was a point of contention in the anti-foreigner movement in Assam?

Faulty voters' registers with the names of immigrants

Answer: Faulty voters' registers with the names of immigrants

One of the issues raised in the Assam movement was the presence of faulty voters' registers that included the names of immigrants.

In 1979 the All Assam Students’ Union (AASU), a students’ group not affiliated with any party, led an anti-foreigner movement. The movement was against illegal migrations, against domination of Bengalis and other outsiders, and against faulty voters’ register that included the names of lakhs of immigrants. The movement demanded that all outsiders who had entered the State after 1951 should be sent back. The agitation followed many novel methods and mobilised all sections of Assamese people, drawing support across the State. It also involved many tragic and violent incidents leading to the loss of property and human lives. The movement also tried to blockade the movement of trains and the supply of oil from Assam to refineries in Bihar.