import pandas as pd

import pydotplus

from IPython.display import Image

from sklearn import tree

from sklearn.tree import DecisionTreeClassifier

........

obj_data = tree.export_graphviz(clf_train, out_file=None, feature_names=list(OHdata.columns.values), class_names=['No', 'Yes'], rounded=True, filled=True)

obj_data is a _____________ (choose one of the following):

Select one:

a. DOT format

b. Graph

c. Image

d. All of Above