The oxford english dictionary keeps track of all of the following except
a. contextual examples of words
c. social groups that use certain words
b. changes a word has undergone
d. the origins of words

The Oxford English Dictionary is a descriptive dictionary that traces all of the following variants except social groups that use certain words.

The Oxford English dictionaries keeps tracks all of the word contextual example, changes of the word has undergone and most of all the origin of the word. So the incorrect among them is letter C. Social group that use certain words. I hope you are satisfied with my answer and feel free to ask for more 

What’s the

D. death in the afternoon