Incorrect!

What should you do if you cannot see clearly behind when you're reversing?

Open the window to look behind
Open the door to look behind
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Look in the nearside mirror
Ask someone to guide you
Correct answer

DVSA theory test explanation

If you want to turn your car around, try to find a place where you have good all-round vision. If this is not possible, and you're unable to see clearly, then get someone to guide you.