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a
It is commonly called crack.
b
It is chemically diacetylmorphine.
c
It is obtained from Cannabis sativa.
d
It has a potent stimulating action on central nervous system.
answer is B.
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Detailed Solution
It is chemically diacetylmorphine.It is commonly called smack.It is obtained from Papaver somniferum.Heroin is a depressant and slows down body functions.