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B
the old, mature flower is at the top of the main axis
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C
the flowers are arranged in a basipetal order
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D
the growth of peduncle is indefinite
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Solution
The correct option is D the growth of peduncle is indefinite In racemose inflorescence, the growth of peduncle is indefinite and never terminates into a flower. Older flowers are at the base and newer flowers are at the apex of the main axis. This type of arrangement of flowers is called acropetal arrangement. In cymose inflorescence, the growth of peduncle is definite and terminates into a flower. The flowers are arranged in acropetal order as the old, mature flower is at the top of the main axis.