The correct answer is: B) Caste-based discrimination.
Sahodaran Ayyappan was a social reformer who fought against caste-based discrimination in Kerala, India. He organized the Misrabhojanam (inter-dining) in 1896, which was a public event where people from different castes ate together. This was a radical act at the time, as caste-based discrimination was deeply entrenched in Indian society. The Misrabhojanam challenged the caste system and helped to raise awareness of the issue of caste discrimination.
A) Colonial authority: Sahodaran Ayyappan was not primarily concerned with colonial authority. He was more concerned with social issues within India, such as caste-based discrimination.
C) Gender inequality: Sahodaran Ayyappan did not focus on gender inequality. He was more concerned with caste-based discrimination.
D) Religious orthodoxy: Sahodaran Ayyappan was not primarily concerned with religious orthodoxy. He was more concerned with social issues within India, such as caste-based discrimination.