The correct order of first ionization enthalpy values of the following elements is :

(A) O

(B) N

(C) Be

(D) F

(E) B

Choose the correct answer from the options given below :

1. A $\mathrm{A}<\mathrm{B}<\mathrm{D}<\mathrm{C}<\mathrm{E}$
2. B $\mathrm{C}<\mathrm{E}<\mathrm{A}<\mathrm{B}<\mathrm{D}$
3. C $\mathrm{E}<\mathrm{C}<\mathrm{A}<\mathrm{B}<\mathrm{D}$ Correct answer
4. D $\mathrm{B}<\mathrm{D}<\mathrm{C}<\mathrm{E}<\mathrm{A}$