A) \[23{{{\scriptscriptstyle 1\!/\!{ }_2}}^{{}^\circ }}S\]
B) \[23{{{\scriptscriptstyle 1\!/\!{ }_2}}^{{}^\circ }}N\]
C) \[25{{{\scriptscriptstyle 1\!/\!{ }_2}}^{{}^\circ }}N\]
D) \[25{{{\scriptscriptstyle 1\!/\!{ }_2}}^{{}^\circ }}S\]
E) None of these
Correct Answer: B
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