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B
Mumbai
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Madras
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Kolkatta
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Solution
The correct option is A Shimla In temperate woody plants (Shimla), the activity of vascular cambium is seasonal. The cambium is less active in autumn and more active in spring.
The difference of growth in secondary xylem results in the formation of alternate rings of autumn wood and spring wood. These two zones constitute an annual or growth ring. By counting the number of annular rings, it is possible to know the age of a plant.