Which instrument is used for seeing above the water on a submarine?

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Source:

  • Choice "A": Thermometer % of users selected this choice.
  • Choice "B": Telescope % of users selected this choice.
  • Choice "C": Periscope % of users selected this choice.
  • Choice "D": Stethoscope % of users selected this choice.
Did you know...
If all the blood vessels of an average adult human were laid out flat; all of our veins, arteries, and capillaries would cover a distance of about 100,000 miles!
Image credit: Ан Нет.