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It can be seen from the program block diagram that when the input ordered number pair (x, y) is (7, 6),

Then the first period x = 6+ 1 = 7. y = 7+ 1 = 8，n = 2；

The second cycle x=8+ 1=9, y=9+ 1= 10, n = 3；;

The third cycle x =10+1=1,y = 1 1 = 12, n = 4；;

The fourth cycle x= 12+ 1= 13, y= 13+ 1= 14, n = 5.

If the condition n < 5 is not met, the loop output will jump out (13, 14).

Therefore, choose: B.