In a large commercial complex there are four ways to reach the main road. One of the path has loose soil, the second is laid with polished marble, the third is laid with bricks and the fourth has gravel surface. It is raining heavily and Paheli wishes to reach the main road. The path on which she is least likely to slip is
$(a)$. loose soil
$(b)$. polished marble
$(c)$. bricks
$(d)$. gravel
Only walking on a gravel surface can give sufficient surface to walk on the road.
So, option $(d)$ is correct.
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