Q.
Choose the correct position of floral parts over thalamus in china rose plant.
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a
The margin of thalamus grows upward enclosing the ovary completely and getting fused with it
b
Gynoecium is present at the centre with ovary partially above and partially below to other floral parts.
c
The gynoecium occupies highest position while the other parts are situated below it
d
Gynoecium is situated at the centre and other parts of the flower are located on the rim of thalamus almost at the same level
answer is C.
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Detailed Solution
In china rose, flowers are hypogynous with superior ovary. In the hypogynous flower the gynoecium occupies the highest position while the other parts are situated below it.

