Which of the following classification system is based entirely on the vegetative properties and the androecium structure of a plant?

The correct option is A Artificial
Classification systems that classify organisms based on only one or a very few specially chosen morphological features are called the artificial classification system. They are based mainly on vegetative characters or the androecium structure according to the scheme given by Linnaeus.

The natural system of classification groups organisms based on external morphological features and internal features like ultrastructure, anatomy, and embryology.

The phylogenetic system of classification is based on the evolutionary relationships between organisms.

George Bentham and Joseph Dalton Hooker’s classification system of flowering plants are classified based on ultrastructure, anatomy, embryology, and phytochemistry. A type of natural system of classification.