Select the most appropriate option that can substitute the highlighted words in the given sentence.
This is the completest book on English Grammar.

Correct option is C

The correct substitution of the highlighted words is (c) complete.
Explanation: "Complete" is an absolute adjective and should not be used in the superlative form like "completest." Adjectives that are already absolute do not take "-er" or "-est" forms.
Grammatical rule used:
�� Absolute adjectives like complete, perfect, unique are not graded or compared.
Example: This is a complete guide to the subject.
�� Information Booster: Avoid “more perfect”, “most unique”, “completest” etc.