Which of the following statements is/are correct? (a) The second io...

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Which of the following statements is/are correct?
(a) The second ionization enthalpy of oxygen element is
P greater than that of fluorine element.
W)
(b) The third ionization enthalpy of phosphorus is greater than that of aluminium.
(c) The first ionization enthalpy of aluminium is slightly greater than that of gallium.
(d) The second ionization enthalpy of copper is greater than that of zinc.
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