Question

question 18 how are nun buoys marked? a yellow with prime numbers b red with even numbers c gray with roman numerals d green without any numbers quit practice exam

Explanation:

Nun buoys are lateral markers used in navigation, typically marked green and do not have numbers (they are paired with red can buoys which have even numbers). Option A is incorrect as nun buoys are green, not yellow. Option B is for red can buoys (even numbers), not nun buoys. Option C is incorrect as gray with Roman numerals is not the marking for nun buoys.

Answer:

D. green without any numbers