(a) First ionization enthalpy of Helium is lesser than the second ionization enthalpy of lithium. (b) Lithium has the highest second ionization enthalpy due to its smallest size. It becomes difficult to remove its second valence electron which is tightly held. (c) All d-block elements are not transition elements. (d) There is no element found in periodic table starting with letter ‘J’. (e) The concentration of francium is ∼10−18 ppm on earth. Therefore, (a), (b), (d) and (e) statements are correct.