Assertion: If the tiger disappears, the deer and other herbivore population will increase and that would affect the flora of the area.
Reason : The tiger depends on deer and many other herbivores for food.

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A is false but R is true

Both A and R are true and R is correct explanation of A

A is true R is false

Both A and R are true but R is not correct explanation of A

answer is B.

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Detailed Solution

If the tiger disappears, the deer and other herbivore population will increase and that would affect the flora of the area. Since tiger is the top carnivore, and in its absence the herbivore population will increase. This will lead to crowding of herbivore species and will adversely affect the ecosystem. There will be more competition for food resources, space, etc.
The tiger depends on deer and many other herbivores for food and is a top predator. This balances the number of species in an ecosystem.

Thus, both statements are true, but B is not the correct explanation of A.

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