Discussion
4-R rule is connected with :
Answer: B
The 4-R rule is connected with glass fracture, option B. The rule says that radial cracks make a right angle on the rear side, which means that they form a right angle at the side of the glass opposite the side on which force was applied, so the direction of a blow or a bullet can be told from the cracks. It is not linked with arson (A), fibre (C) or soil (D).
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