Question: In addition you have the option of reserving a seat with more leg room
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Answer: In addition, you have the option of reserving a seat with more leg room.

Question: Micrometre per second ms
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Answer: Micrometre per second (m/s)

Question: In several of the experiments we have learnt that fire needs oxygen to burn
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Answer: In several of the experiments, we have learnt that fire needs oxygen to burn.

Question: With Crown Prince Christian Vs monogram
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Answer:
With Crown Prince Christian (V)'s monogram.