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Match the following items of column I with the
P appropriate items in column II.

W
Column 1 Column II
Molecular species Bond order and magnetic
property
P. \( \mathrm{O}_{2}^{-} \)
I. 2.5 paramagnetic
Q. \( \mathrm{O}_{2} \)
II. \( \quad 2.0 \) diamagnetic
R. \( \mathrm{O}_{2}^{+} \)
III. \( \quad 1.5 \) diamagnetic
S. \( \mathrm{O}_{2}^{-2} \)
IV. 1.0 diamagnetic
V. 2.0 paramagnetic
VI. 1.5 paramagnetic
(1) P-III, Q-V, R-IV, S-III
(2) P-III, Q-II, R-I, S-IV
(3) P-III, Q-V, R-IV, S-VI
(4) P-VI, Q-V, R-I, S-IV
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