Question

Travelling by air is very important to ensure the (a) along with other
things. Oxygen mask is very (b) for each passenger. Putting on life
Vest is (c) mandatory when it is asked by the crew (d) __. A
passenger should read the given information before (e) off. In case of
an emergency, they should take up bracing position.
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Answer 1

Answer:

all of the above are the answers