Classrooms of most of the primary schools in Bihar are inadequate.
A.if you think the inference is 'definitely true'.
B.if you think the inference is 'probably true' though not definitely true in the light of the facts given.
C.if the data given is inadequate i.e., from the fact given you cannot say whether the inference is likely to be true or false.
D.if you think the inference is probably false though not definitely false in the light of he facts given and.
Answer: B
It is given in the passage that pupils in more than 50 percent of the schools read in the open. Perhaps this is because the classes provided are inadequate.