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How many plants among China rose, Ocimum, sunflower, mustard, Alstonia, guava, Calotropis and Nerium (Oleander) have opposite phyllotaxy?

1. Two
2. Three
3. Four
4. Five

Correct answer: Three

Solution

Opposite phyllotaxy means two leaves arise at the same node, opposite each other. Among the given plants, Ocimum, Calotropis, and Nerium show opposite phyllotaxy, so the total is three.

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