The correct option is B Elimination of the caste system
Many social evils like the denial of equal opportunity and exploitation prevailed in Kerala due to rigid caste hierarchy. Discrimination was apparent in clothing, occupation, dwellings, language and even names. Women were denied equal opportunities. It is this social condition that prompted Swami Vivekananda to describe Kerala as a 'lunatic asylum'.
During this period, several social reform movements were formed in Kerala to tackle them. Sree Narayana Guru who was one of the social reformers in Kerala. Elimination of the caste system was the primary aim of Gurus social activities. He toiled for communal harmony.