Select the most appropriate option that can substitute the highlighted segment.
In according to his advice I took this medicine.

Correct option is A

The correct substitution is (a) accordance with.
Explanation:
The correct phrase is “in accordance with” which means “in agreement with” or “as per.”
Correct sentence: In accordance with his advice, I took this medicine.
Grammatical Rule Used:
�� Fixed prepositional phrases – Certain expressions require fixed combinations.
Example: In accordance with the rules, we canceled the event.
Meanings of other options:
· (b) Accordingly: Adverb, not suitable here
· (c) Accordance to: Incorrect combination
· (d) Accord with: Verb form, not suitable with “in”