Which of the following statements with regard to the heterodox sect between sixth and fourth century BC are correct?; I. The Jain ideals were already being circulated in the seventh century BC by Parshava.; II. Although Buddhism, and to a lesser extent Jainism, took account of the changes in material life and reacted against orthodoxy, neither of these sought to abolish the caste system.; III. The first female disciple of Mahavira is said to have been a captured slave woman.; IV. Buddha held that nuns could attain spiritual liberation just like a monk and granted them an equal status in the mendicant order.