Answer
Annie Besant met Helena Blavatsky in 1890. Besant was a prominent British socialist and theosophist, while Blavatsky was a Russian occultist and co-founder of Theosophical Society. Besant's encounter with Blavatsky marked a turning point in her life, as she became deeply involved in theosophy and eventually succeeded Blavatsky as the leader of Theosophical Society.