· D sets the context for the topic of literacy and illiteracy in India, mentioning that there are both more literate and illiterate people than before.
· A builds on this by discussing the paradox: although more children go to school, more children are still out of school.
· B shifts focus to the issue of high birth rates, suggesting that it isn't enough to simply blame them for the situation.
· C presents an argument that illiteracy is not just a result of the high birth rate, but rather a cause of it.
Thus, the correct sequence of sentences is: D, A, B, C.