The number of bridged oxygen atoms present in compound B formed from the following reactions is

Pb(NO₃)₂ $$\buildrel {673\,K} \over \longrightarrow $$ A + PbO + O₂

A $$\buildrel {Dimerise} \over \longrightarrow $$ B

White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :

Identify the correct statement for B₂H₆ from those given below :

(A) In B₂H₆, all B-H bonds are equivalent.

(B) In B₂H₆, there are four 3-centre-2-electron bonds.

(C) B₂H₆ is a Lewis acid.

(D) B₂H₆ can be synthesized from both BF₃ and NaBH₄.

(E) B₂H₆ is a planar molecule.

Choose the most appropriate answer from the options given below :