Which one of the following elements has the highest ionisation energy

1.	Which one of the following elements has the highest ionisation energy [IIT-JEE 1990]
A.	\[[Ne]\,3{{s}^{2}}\,3{{p}^{1}}\]
B.	\[[Ne]\,3{{s}^{2}}\,3{{p}^{2}}\]
C.	\[[Ne]\,3{{s}^{2}}\,3{{p}^{3}}\]
D.	\[[Ar]\,3{{d}^{10}}\,4{{s}^{2}}\,4{{p}^{2}}\]
Answer» D. \[[Ar]\,3{{d}^{10}}\,4{{s}^{2}}\,4{{p}^{2}}\]

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Which one of the following elements has the highest ionisation energy [IIT-JEE 1990]

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