Answer: The correct form of the word that completes the sentence is <u>"druggist"</u>: "He went to the druggist to get his medication".
Explanation: The correct way of spelling the word that fills in the blank is <u>"druggist"</u>, that is to say that<u> this word is always written with double "g" </u>and that <u>writing it with just one "g" is considered to be incorrect</u>. Moreover, "druggist" is a noun used to refer to a pharmacist or a professional that prepares and distributes medicinal drugs. In that way,<u> the word "druggist" is formed doubling the consonant "g" and adding the suffix "-ist" at the end of the root word "drug"</u>.