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According to Locard’s principle which of the following is correct?

Question and options

According to Locard’s principle which of the following is correct?
  1. Similar objects can be compared
  2. Every object changes with the passage of time
  3. Every contact leaves some trace
  4. Every object is unique

Answer and explanation

Correct answer: C - Every contact leaves some trace
Locard's exchange principle: every contact leaves a trace. The other options describe the separate principles of comparison, progressive change and individuality.

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