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The simple subject is the main word of the subject, without any adjectives or modifications, one that would be enough to form a correct sentence; and the complete subject is one with all the adjectives and modifiers.
For example: B:
Dinosaurs: simple subject
<span>Large and small dinosaurs: complete subject.
In option C </span>the simple subject is the complete subject: "Cory"
Answer:
=students should enter the exam hall by 10 am
=students should bring admit card in order to give their exam paper
= no one is allowed to talk and should maintain silence in the exam hall
= student are not allowed to talk to the invigilator rudely
= students are not allowed to leave the hall before one hour
D. a nuclear power plant.