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a
Petiole helps the lamina to flutter in the air
b
Midrib is present in the lamina
c
Venation provides mechanical support to lamina
d
Leaves arise at the internodes of plant.
answer is D.
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Detailed Solution
Leaves do not arise at internodes but arise at nodal region. Mid rib runs from base to apex of lamina. Petiole helps the lamina to flutter in the air. Veins provide mechanical support to lamina and also determine the size and shape of lamina besides involving in conduction.