In Which of the Following Cases, Will the Presumption of No

In which of the following cases, will the presumption of no intention to create legal relations arise?

A) an agreement for the sale of a motor car entered into by two brothers
B) an agreement for the sale of a house entered into by two life long best friends, both of whom are realtors.
C) An agreement for the sale of a painting entered into between two sisters
D) a lease agreement entered into between a mother and her son
E) All of the above