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请根据Python的相等性判断规则，选择以下正确的选项
执行a = 1; b = 1后，a is b的返回结果为True
a = 1; b = 1
a is b
执行c = "Python"; d = "Python"后，c == d的返回结果为False
c = "Python"; d = "Python"
c == d
执行e = [1, 2]; f = [1, 2]后，e is f的返回结果为True
e = [1, 2]; f = [1, 2]
e is f
执行g = 256; h = 256后，g is h的返回结果为True
g = 256; h = 256
g is h