Today I found the following question in a question paper
In what ways does soils differ?
My understanding is that the subject here in this sentence is soils, which is plural. If the subject is plural how can we use does in that question? Isn't that question wrong?
I believe that the correct question is : In what ways do soils differ?
Which one is correct?
-I am asking this question because it appeared in an exam conducted by a government agency and I am sure that questions were made by experts.-=