A. UV light B. Spectroscopy
C. Magnifying lens D. Infra red
Answer: A.
Explanation:
UV light:is useful in fluorescence tests, such as examining stains on garments mainly seminal stains. seminal stains show a fluorescence of a bluish-white colour(due to choline).
Spectroscopy: most delicate & reliable test for detecting the presence of blood in both recent and old stains.
Magnifying lens: mainly used to see the edges and floor of the wounds.
Infra red:will assist in the examination of closed letters, questioned documents, etc.
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