Abu scratched four different materials P, Q, R and S with an iron nail. He observed that he could make a scratch only on material S with the Iron nail. Based on this, what can be said about material S?
A. It is definitely metal.
B. It can be any material.
C. It is either plastic or wood
. D. It is a softer material than iron.
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Answer:
D
Explanation:
A harder material will always scratch/dent a softer material
Hope this helps :)
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