Question
Answers

Autumn Crocus is source of
A)Azides
B)Chalones
C)Colchicine
D)Cytokinin

Answer
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Hint: Colchicum autumnale that is commonly famous as autumn crocus. It is a type of flowering plant whose flowers resemble and are identical to that of lily. This plant generates bulb-like Corms in a large amount.

Complete answer:
The bulb-like corms that are present in plants of C. autumnale contain colchicine, it is a useful drug with a narrow therapeutic index. Colchicine is approved and used in many countries for the treatment of gout and familial Mediterranean fever. Colchicine is also used and helps in plant breeding to produce polyploid strains.

Now let us match this with given options:
Azides : it is a kind of anion that has the formula $\mathop N\nolimits_3^ - $. They are prepared by the reaction of nitrous oxide with sodium amide in solution of liquid ammonia.
Chalones : these chalones are defined as tissue specific substances that stops and inhibits the proliferation of the immature cells.
Colchicine : it is obtained from Autumn crocus. Colchicine is approved and used in many countries for the treatment of gout and familial Mediterranean fever.
Cytokinin : It is a plant hormone. It is obtained from rice seedlings. It helps in the germination of seed and also in the fruit ripening.

Hence, the correct answer is option (C)

Note: Colchicine is an important medicinal compound that functions to prevent gout attacks (sudden, severe pain in one or more joints that usually occurs abnormally high levels of a substance called uric acid in the blood) in adults.