With regard to institution of caste during colonial period, which of the following statements is/are correct?

1. The British studied caste as a social institution but no effort was sought to study the social hierarchy of caste.

2. The practice of officially recording caste status by the British strengthened caste identities.

3. Caste based rights got recognition during the colonial system.

4. The terms, Schedule castes and Schedule tribes have origin in the British period.

Select the correct answer using the code given below: