Which of the following compounds contain three-centered two-electron bonding, (i) $$[\mathrm{BeF_2}]_n$$, (ii) $$[\mathrm{Be(CH_3)_3}]_n$$, (iii) $$[\mathrm{BeCl_2}]_n$$, (iv) $$[\mathrm{BeH_2}]_n$$

A

(i) and (ii)

B

(ii) and (iii)

C

(ii) and (iv)

D

(iii) and (iv)