Among the following, the pair of elements having same electronegativity values are I. $\mathrm{H}$ and $\mathrm{P}$ II. Be and $\mathrm{Al}$ III. $\mathrm{N}$ and $\mathrm{Cl}$ IV. C and P

• Correct answer
  A

  I, II and III
• B

  II, III and IV
• C

  I, III and IV
• D

  I, II, III and IV

Solution

Electronegativity is the tendency of an atom to attract a shared pair of electrons.
Electronegativity of $\mathrm{H} \approx \mathrm{P}, \mathrm{Be} \approx \mathrm{Al}$ and $\mathrm{N} \approx \mathrm{Cl}$.

Hence, the correct answer is option: 'A'.