Question

She is blind _______ the faults of her only son

Answer 1

She is blind to the faults of her only son.

Answer 2

Answer:

She is blind to the faults of her only son.  

Explanation:

'To' is the proposition added in the sentence to complete the sentence.  

Prepositions are a word used to connect nouns, phrases or pronouns within a sentence. Prepositions are generally placed before nouns to make the sentence meaningful and they are normally short.  

Examples are to, above, under, of, at, in, these,etc., are few of the prepositions that we normally use.