According to the Census 2011 of India, which of the following states has the lowest literacy rate?

Correct option is D

As per the 2011 Census of India, Arunachal Pradesh recorded one of the lowest literacy rates among all states, especially in tribal and remote regions. Despite its low population, access to quality education remains a major challenge in this northeastern state.
Explanation of options: (a) ✘ Gujarat has a significantly higher literacy rate and a strong educational infrastructure. (b) ✘ Uttar Pradesh, though large and diverse, still ranks higher than Arunachal Pradesh in literacy. (c) ✘ Rajasthan has had literacy challenges but has made substantial improvements. (d) ✔ Arunachal Pradesh is among the lowest in literacy due to geographical and demographic constraints.