In the given question, we are asked to identify the true statements about Jyotirao Phule`s Satyashodhak Samaj Movement in Maharashtra. Let`s dissect each option:

Option 1: 1 and 2 only

This option suggests that only statement 1 and statement 2 are true. Statement 1 states that the Satyashodhak Samaj was set up in 1873. This is correct as Jyotirao Phule established the Satyashodhak Samaj in Maharashtra in 1873. Statement 2 claims that Phule argued that Brahmins were the progeny of `alien` Aryans. This is also true as Phule criticized Brahmins for their claim to Aryan ancestry and argued that they were in fact descendants of invaders.

Option 2: 2 only

This option suggests that only statement 2 is true. As explained earlier, statement 2 is indeed true, but this option excludes statement 1, which is incorrect. The Satyashodhak Samaj was not set up in 1873.

Option 3: 1 and 3 only

This option suggests that only statement 1 and statement 3 are true. Statement 1,