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(A) The correct answer is $A$ (disruptive).Natural selection can lead to three main outcomes:$1$. Stabilising selection: In this,more individuals acqu

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(A) The correct answer is $A$ (disruptive).Natural selection can lead to three main outcomes:$1$. Stabilising selection: In this,more individuals acquire the mean character value,reducing variation.$2$. Directional selection: In this,more individuals acquire values other than the mean character value,shifting the population towards one extreme.$3$. Disruptive selection: In this,more individuals acquire peripheral character values at both ends of the distribution curve,while the intermediate (mean) individuals are selected against. Since the population shows only extreme tall and extreme dwarf plants with no intermediate forms,it is a clear case of disruptive selection.

In a population of plants,some were extremely tall,and the remaining were extremely dwarf. No plants of the population showed intermediate height. The type of operation of natural selection in the above case is

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