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Q.

A placentation in which ovules are born on central axis and septa are absent, is found in 

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a

Argemone and mustard 

b

pea 

c

Dianthus and primrose 

d

rose and tomato 

answer is B.

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Detailed Solution

 When the ovules are borne on central axis and septa are absent, as in Dianthus and primrose, the placentation is called free central.

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