The correct option is B There were 900 female children per 1000 male children in age category of 0-6 years.
The child sex ratio is the number of female children for every thousand male children in the age group of 0 to 6 years. As per the sources, the child sex ratio in India was 900 for the period 2013-2015. Ideally, the number should be equal, that is, 1000 male and female children.