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Problem
Problem
Which of the following is V-shaped : a.
S
3
2
−
S_3^{2-}
S
3
2
−
b.
I
3
−
I_3^-
I
3
−
c.
N
3
−
N_3^-
N
3
−
d.
I
3
+
I_3^+
I
3
+
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