Consider the following statements regarding Sex Ratio of India and identify the correct one/s.

1. The sex ratio in the country has always remained unfavourable to females.

2. The sex ratio has registered an increase at census 2011 over 2001; however, child sex ratio has declined.

3. Sex ratio at the beginning of 20th century was lower than the ratio at beginning of 21st century.

Select the correct answer using the codes below.