单项选择题

public class X { 
public static void main (String[]args)  { 
String s1 = new String (“true”); 
Boolean b1 = new Boolean (true); 
if (s2.equals(b1))   { 
System.out.printIn(“Equal”); 
} 
} 
}     
What is the result?()  

A. The program runs and prints nothing.
B. The program runs and prints “Equal”
C. An error at line 5 causes compilation to fail.
D. The program runs but aborts with an exception.

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