Satyashodhak Smaj, founded in 1873, was specifically devoted to securing social justice for whom?

Low-caste people

The correct answer is Option (1) → Low-caste people.

Jotirao Govindrao Phule denounced the injustice of the caste system and scorned its rules of purity and pollution. In 1873 he founded the Satyashodhak Samaj (Truth Seekers Society), which was devoted to securing human rights and social justice for low-caste people.