Lala Lajpat Rai, a prominent Indian freedom fighter, was deported to Mandalay for organizing the agrarian movement in Punjab. The agrarian movement aimed to address the grievances of the farmers and landless peasants and fight against the oppressive land revenue policies implemented by the British colonial government. Lala Lajpat Rai`s involvement in this movement led to his deportation.

The correct answer is option 2: 1907. This means that Lala Lajpat Rai was deported to Mandalay in the year 1907 for his participation in the agrarian movement. It is important to note that Lala Lajpat Rai was known for his activism and played a significant role in India`s struggle for independence.