Which of the following is/are correct?

1. Indian society during the nineteenth century was. marred by religious superstitions and social obscurantism.

2. Social conditions for women were good but some vices like sati, and child marriage prevailed in society.

3. Raja Ram Mohan said, "Sati is murder according to every shastra."

4. People on the lower ladder of society were called untouchables, who formed about 20 per cent of the population.