Choose the most appropriate phrases given below the sentence to replace the phrase printed in bold letters to make the sentence grammatically correct. Choose the best option among the five given alternatives that reflect the correct use of the phrase in the context of the grammatically correct sentence. If the sentence is correct as it is, mark “No correction” as the answer.

I told him not to count his chickens after they hatch, but he went ahead and made plans.

Correct option is A

The correct phrase to use in this context is option (a) " not to count his chickens before they hatch ". The correct sentence formed will be: " I told him not to count his chickens before they hatch, but he went ahead and made plans.” In the sentence, “not to count his chickens before they hatch” is an idiomatic expression which means not to make plans based on something that may not happen. It implies that it is better to wait until a situation has fully materialized before making plans or decisions.
The given sentence " I told him not to count his chickens after they hatch, but he went ahead and made plans” contains a grammatical error as the preposition "after" should be replaced with "before" to convey the intended meaning of the idiom.
Option (b) “ not onto count his chickens before they hatch” contains a grammatical error in the sentence as the word "onto" is unnecessary and changes the intended meaning of the sentence.
Option (c) “ not to count her chickens before they hatch” contains a grammatical error in the sentence as the pronoun "her" is incorrect. It should be "his" to agree with the subject "him."
Option (d) “ not to count his chickens after they hatched” contains a grammatical error in the sentence as the verb "hatched" should be in the present tense to agree with the main verb "count." Additionally, the use of "after" instead of "before" contradicts the intended meaning of the idiom.