📊 Data Science
Q. What Python function is used to create a new column in a Pandas DataFrame based on the values of existing columns?
  • (A) pd.read_csv()
  • (B) np.array()
  • (C) plt.plot()
  • (D) df['new_column'] = ...
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✅ Correct Answer: (D) df['new_column'] = ...

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