Dhatura is a classical example of

Answer: Option B

Dhatura is a classical example of Trisomic.
The term "trisomy" is used to describe the presence of an extra chromosome or three instead of the usual pair.
Trisomic plants can be distinguished from diploids by enlarged bracts, an increased number of flowers per inflorescence, and slightly undulated margins of stipules and leaflets, and the mean number of seeds per pod is reduced compared to ordinary diploids.