Fill the blank:
The _ _ _ _ _ of daffodils is used in the medicine to treat Alzheimer’s and polio.

a) Extract
b) Extraction
c) Extracted
d) Extracting

Hint: The word that will fill the blank is a process of taking out something from another thing, but it is also a noun.

Complete answer:

Option a “extract” means to remove or take out, especially by effort or force. This is a suitable word for the blank given to us. Thus, the option ‘a’ is the correct answer.
Option b “extraction” is a noun that means the action of taking out something. But extraction is an actual process while “extract” is something obtained from another thing through a specific process. Therefore, option ‘b’ is incorrect.
Option c “extracted” is the past participle of the word “extract”. Extracted would again be a process, not a noun (substance collected or obtained). Thus, option ‘c’ is incorrect too.
Option d “extracting” is again a process and is the present participle of the word “extract”. This is inappropriate in the context as it would make the sentence grammatically incorrect. Therefore, option ‘d’ is incorrect.

Note: The word “extract” here means a substance found in daffodils which I used to treat a disease.