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B
Pulvinus is the swollen base of the leaf
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C
A single stipule is present at the base of a stalk of a leaf
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D
Thalamus is present at the tip of a floral stalk
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Solution
The correct option is C
A single stipule is present at the base of a stalk of a leaf
The leaf is attached to the stem by the leaf base and may bear two lateral small leaf like structures called stipules. In some leguminous plants the leaf base may become swollen, which is called the pulvinus. The petiole help hold the blade to light. Some leaves do not have a stalk or petiole and are attached directly to the stem. Such leaves are called sessile. Thalamus is the swollen part of the pedicel of a flower on which all the whorls of a flower are arranged.