Discussion
Following is the active component of marking nut :
Answer: A
The active component of the marking nut (Semecarpus anacardium) is semecarpol, a phenolic oil found in the pericarp of the nut which causes blisters on the skin and is used in marking cloth. Semicarpine, semicarbine and semicarmine are not the names of its active principle. So A is correct. The nut is the fruit of a tree found in India and is also called bhilawa. Its juice is black and has been used for marking linen by washermen, which is how it gets the name. Because the juice blisters the skin, it is a plant irritant poison of forensic interest, and poisoning by it can occur by contact with the skin or after swallowing the nut.
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