Question

Which of the following statements are correct?
I. In cyathium flowers are pollinated by Blastophaga
II. Bilipped corolla is seen in Ocimum
III. Basal placentation is found in Dianthus
IV. Whorled phyllotaxy is found in Alstonia

• A. I and II
• B. II and IV
• C. III and IV
• D. I and IV

Hint:

Phyllotaxy and placentation are key morphological features in plant taxonomy.

Answer 1

The Correct Option is B

Step 1: Evaluating the statements 
Statement I: Cyathium-type flowers, such as those in Euphorbia, are pollinated by insects, but not specifically by Blastophaga (Incorrect). 
Statement II: Bilipped corolla (two-lipped structure) is present in Ocimum (Correct). 
Statement III: Basal placentation is found in sunflower (Asteraceae), but Dianthus has free central placentation (Incorrect). 
Statement IV: Whorled phyllotaxy (leaf arrangement in a whorl) is found in Alstonia (Correct). 
Step 2: Evaluating the options 
Option (1): Incorrect, as I is incorrect. 
Option (2): Correct, as II and IV are both correct. 
Option (3): Incorrect, as III is incorrect. 
Option (4): Incorrect, as I is incorrect. 
Final Answer: \[ II { and } IV \]