Help me in solving JAARRAYMCQ2 problem

My issue

need some explanation

Learning course: Arrays using Java
Problem Link: CodeChef: Practical coding for everyone


its simple what kind of explanation u need?
Correct Answer:

A <= 2*B, and B <= 2*A

i didnt understand the 3rd Example compared to 1 and 2

for A=300 and B=500.
its should meet

A <= 2*B, and B <= 2*A

so 300 <= 1000 and 500 <=600
so for this case both will be happy.