$A$ : In Smilax, stipule changes into tendril & helps in climbing.
$R$ : Parallel venation is found in this plant.
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
The whorl of bracts present below the inflorescence of Helianthus $(sunflower)$ is
Bulb of Allium cepa $(Onion)$ is
Maturation of male and female sex organs at different time in a flower is called
Two spines in Trapa fruit $('Singhara'\,\, fruit)$ are modifications of
Aril helps in