Final answer:
The option most similar to the word pair 'Chalk : Blackboard' is Marker : Whiteboard.
Step-by-step explanation:
The option most similar to the word pair 'Chalk : Blackboard' is B) Marker : Whiteboard.
Chalk is commonly used with a blackboard, while a marker is commonly used with a whiteboard. Just like chalk and a blackboard, a marker and a whiteboard are often used together for writing and drawing purposes.
Therefore, the best option that represents a similar relationship to the given word pair is Marker : Whiteboard.