The original sentence, "One cause of folate deficiency is {{c1::drugs}}, such as folate antagonists," uses "is" as the verb, which does not agree with the plural subject "drugs."
In the revised sentence, "One cause of folate deficiency are {{c1::drugs}}, such as folate antagonists," the verb "are" is also incorrect because the true subject is "One cause" (singular). The phrase "of folate deficiency" and the appositive "drugs" do not change the fact that the main subject remains singular.
Correct Fix:
"One cause of folate deficiency is {{c1::drugs}}, such as folate antagonists."
The original sentence is actually correct because "One cause" (singular) requires the singular verb "is."
If the intent is to emphasize multiple causes, then the sentence could be rewritten as:
"Causes of folate deficiency include {{c1::drugs}}, such as folate antagonists."
According to your rationale, ChatGPT also thinks this suggestion is grammatically incorrect?
Watch Trimethoprim/Sulfamethoxazole
Watch Vitamin B9 (Folate)
Watch Megaloblastic Anemia: Folate Deficiency & Vitamin B Deficiency
Watch Neural Tube Defects, Holoprosencephaly, Chiari Malformation & Syringomyelia
.jpg)
.jpg)
.jpg)
Watch associated Bootcamp video - Vitamins: Vitamin B9 (Folate)
