A and C are correct in the given sentence. B is incorrect. We are talking about the radical literature. So, ‘who’ is incorrect. Also, ‘when’, given in the option is incorrect. The correct word that can be used there is ‘which’. So, ‘None of the A, B and C’ is the correct option. During the investigation, some materials containing radical literature were found, which included a book on caste issues in India and a translation of the dissent notes written by Rosa Luxemburg to Lenin.