What will be the output of the following Python code?
x = ['ab', 'cd']
for i in x:
i.upper()
print(x)
x = ['ab', 'cd']
for i in x:
i.upper()
print(x)A. ['ab', 'cd']
B. ['AB', 'CD']
C. [None, None]
D. none of the mentioned
Answer: Option A

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