Discussion
Fractures due to heat are
Answer: D
The key gives wavy as the fracture pattern due to heat. Heat fractures of the skull are irregular, with curved or wavy lines, caused by drying and shrinking of the bone.
Radial fractures and hackle marks are features of the way glass breaks, and a spiral fracture comes from twisting force on a long bone. None of those describes a heat fracture. When burnt, the bone dries, shrinks and splits along curved lines, so the fractures do not show a single point of impact or a regular line from a blow, and this is the way an examiner tells a heat fracture from one caused by violence.
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