Correct option - 3 Firstly, 'teacher' is a singular noun, so it should take singular verb i.e. gives. Hence, option 5 is eliminated. Let's find out the meanings of the following words:- Salubrious - health-giving; healthy; beneficial. Cataclysmic - a natural event that is large-scale and violent. Now, an advice is never given to perform violent actions. Hence, C is eliminated. Also, the sentence is in active voice form, since by is not given. Thus, B is eliminated. So, i.e. only A is the correct answer. Correct sentence - The teacher gave some salubrious advice to the students.