Which of the following statements describes an atom accurately? i. atoms of all elements are identical ii. an atom contains a nucleus and number of electrons iii. due to the electrons in the atom an atom is negatively charged iv. electrons in the atom move in circular orbits round the nucleus

A. i and ii
B. ii and iii
C. iii and iv
D. ii and iv only  
E. i,ii and iii

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Correct Answer: D