Which one of the following contain (3c -2e) bonds?
(i) B₂H₆
(ii) BeCI₂
(iii) BeH₂
(iv) AI₂CI₆

A. (i), (ii) and (iii)
B, (i) and (iii)
C. (i), (ii) and (iv)
D. (ii) and (iii)