Step 1: Understanding the question
The question asks about the year when the All Assam Students' Union (AASU) led an anti-foreigner movement. The movement was primarily a protest against the illegal migration of people from neighboring Bangladesh to Assam. This movement led to widespread protests in Assam in the late 1970s.
Step 2: Analyzing the options
- 1. 1979 → This is the correct answer. The AASU led the anti-foreigners' movement in Assam beginning in 1979.
- 2. 1978 → While protests against illegal migration were gaining momentum, the official and major movement started in 1979.
- 3. 1976 → This is too early, as the movement did not start this early.
- 4. 1977 → This is not the correct year for the movement's official launch.
Step 3: Conclusion
The correct year is 1979 when the All Assam Students' Union (AASU) launched the anti-foreigners' movement, which later played a significant role in shaping Assam's political landscape. Hence, the correct answer is option (A).