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Which three will compile and run without exception?()

A.private synchronized Object o;
B.void go(){   synchronized(){/* code here */}
C.public synchronized void go(){/* code here */}
D.private synchronized(this) void go(){/* code here */}
E.void go(){   synchronized(Object.class){/* code here */}
F.void go(){   Object o = new Object();   synchronized(o){/* code here */}

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