Select all formally correct sentences with a fronted negative or restrictive adverbial.
Seldom do the ferries run after midnight.✓Correct answer
Rarely the laboratory is this quiet.
Never has our branch missed a deadline.✓Correct answer
Under no circumstances should the seal be removed.✓Correct answer
Explanation
The correct sentences place an auxiliary or modal before the subject after the fronted expression. The rejected sentence leaves the subject before its auxiliary, so the required inversion is absent.