The graph have 0 real roots. Hence the correct option is a.
When a graph has zero real roots, it implies that the equation represented by the graph does not intersect the x-axis. Real roots correspond to the points where the graph crosses or touches the x-axis, indicating solutions to the equation. If there are no real roots, it means that the equation does not have any real values of the variable that make it equal to zero.
In practical terms, this suggests that the equation may represent a mathematical expression or relationship that doesn't have solutions in the real number system for certain values of the variable. The absence of real roots can be indicative of different characteristics of the equation, such as it being entirely above or below the x-axis or having complex roots. Understanding the root structure of a graph provides valuable information about the behavior of the corresponding equation in relation to the x-axis. Hence the correct option is a.