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Consider the following statements : (A) The principal quantum number ‘n’ is a positive integer with values of ‘n’ = 1, 2, 3, …. (B) The azimuthal quantum number ‘l’ for a given ‘n’ (principal quantum number) can have values as ‘l’ = 0, 1, 2, …n (C) Magnetic orbital quantum number ‘ml’ for a particular ‘l’ (azimuthal quantum number) has (2l + 1) values. (D) ± 1/2 are the two possible orientations of electron spin. (E) For l = 5, there will be a total of 9 orbital Which of the above statements are correct?

1. (A), (B) and (C)
2. (A), (C), (D) and (E)
3. (A), (C) and (D)
4. (A), (B), (C) and (D)

Correct answer: (A), (C) and (D)

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