Which of the following is a two-dimensional labelled data structure of Python ?

1. Relation
2. DataFrame
3. Series
4. Square

When we create a DataFrame from a list of Dictionaries the columns labels are formed by the :

1. Union of the keys of the dictionaries
2. Intersection of the keys of the dictionaries
3. Union of the values of the dictionaries
4. Intersection of the values of the dictionaries

If a dataframe is created using a 2D dictionary, then the column labels are formed from …………… .

1. dictionary's values
2. inner dictionary's keys
3. outer dictionary's keys
4. none of these

Which of the following can be used to specify the data while creating a DataFrame ?

1. Series
2. List of Dictionaries
3. Structured ndarray
4. All of these