Answer:
option (c) Lexicon
Explanation:
The part of language which involves the knowledge of the proper use of the word accept is option (c) Lexicon
The Lexicon is the list of words with their proper definition, their linguistic significance and how to use the particular word in the sentence.
Here, in the given sentence the grammar and the concept is correct but the word accept has been used instead of 'except'
The word accept means to agree
while except means to exclude or other than from the given choices.