“Brahmachaya” means

Brahmacharya (often spelled Brahmacharya) is a concept in Hindu philosophy referring to celibacy and control over all senses. While it encompasses self-control and self-discipline, its specific meaning in Gandhi's context and in traditional understanding is mastery over carnal desires and sexual impulses. Gandhi viewed Brahmacharya not merely as celibacy but as complete control over all senses and thoughts. Option A 'Mastery over carnal desires' most directly captures the essence of Brahmacharya in this context. While 'Self Control' (D) is related, it's more general - Brahmacharya specifically refers to mastery over sensual/sexual desires.