Parts of the following sentence have been given as options. Select the option that contains a grammatical error.
The scientists have concluded that their research shows a correlation between air pollution and the decline in bird populations, and they recommends immediate action to reduce emissions.

Correct option is D

✔️ Option (d) and they recommends immediate action to reduce emissions contains the error.
· Explanation:
· Subject “they” is plural, so the verb should be “ recommend” (base form), not “ recommends” (which is used with singular subjects).
· Grammatical rule used:
· In subject-verb agreement, plural subjects must take base verb (without -s) in present simple tense.
· Hindi Explanation: “They” एक plural subject है, इसलिए इसके साथ “recommend” (बिना -s के) आएगा।
· Meanings of all the other options:
· (a), (b), (c) – All are grammatically correct and logically connected.