Worldwide, 1 in 5 adults cannot read or write and of them are women.

Actually in this whole world the major ill-literates are definitely women from many decades for sure, The main reason being most of them women where made or treated to be like that by our society any where any place in this world ie, just for giving birth to kids and looking after them and also the house chores, which was or is one of the main reason 1 in 5 adults cannot read or write where most of them are women, but now in the modern technology generation its slowly changing and equality will surely come in the next future.

The answer is d 18ft