Chemistry - PERIODIC TABLE Question with Solution | TestHub

Three elements $M_a,M_b\&M_c$ are of $p$-block, belonging to $2^{\text{nd }}$ period or $3^{\text{rd }}$ period satisfy the following conditions

(i) Only one of either $M_a,M_b$ or $M_c$ has positive value of $\Delta H_{\text{E.G.E. }}$

(ii)${\mathrm{M}}_{\mathrm{b}}$ has highest covalent radius among all

(iii) ${\mathrm{M}}_{\mathrm{a}}$ has highest IE, among all

(iv)Electronegativity order $M_a>M_b>M_c$

Which of the following is/are correct representation of M_a, M_b & M_c respectively.