In which year Asom Gana Parishad came to power in Assam?

1985

The correct answer is option (3) - 1985

Asom Gana Parishad (AGP) came to power in 1985 with the promise of building a 'Golden Assam.'

After six years of unrest, the government led by Rajiv Gandhi engaged in negotiations with the AASU leaders, resulting in the signing of an accord in 1985. According to this agreement, individuals who had migrated into Assam during and after the Bangladesh war and subsequent periods were to be identified and deported. Following the successful conclusion of the movement, both the AASU and the Asom Gana Sangram Parishad reorganized themselves into a regional political party known as Asom Gana Parishad (AGP). This party came to power in 1985, promising to address the issue of foreign nationals and to foster the development of a 'Golden Assam.'