[amp_mcq option1=”a” option2=”an” option3=”the” option4=”no article” correct=”option4″]
The correct answer is D. no article.
The word “optician” is a common noun, which means that it refers to any person who is an optician. Common nouns are not preceded by articles unless they are specific or unique. In this case, the son is not a specific or unique optician, so the article “a” or “an” is not necessary.
The article “a” is used before singular common nouns that begin with a consonant sound. The article “an” is used before singular common nouns that begin with a vowel sound. In this case, the word “optician” begins with a consonant sound, so the article “a” would be used if it were necessary.
The article “the” is used before singular common nouns that are specific or unique. In this case, the son is not a specific or unique optician, so the article “the” is not necessary.
In conclusion, the correct answer is D. no article.