Which amongst the following is/are correct?       

(i) Indian society during the nineteenth century was marred by religious superstitions and social obscurantism

(ii) Social conditions of women were good but some vices like Sati, Child marriage I prevailed in the society.

(iii) Raja Ram Mohan Rai said "Sati is murder according to every shastra".

(iv) People at the lower ladder of the society were called untouchables, who formed about 20 percent of the population