Compound (A) on reduction with `LiAIH_4` gives a hydribe (P) containing 21.72% hydrogen along with other products.The one mole of hydride (P) and 2 moles of ammonia at higher temperature gives a compound (Q) which is known as inorganic benzene. (A) hydrolyses incompletely and forms a compound (R) and `H_3BO_2`
In hydride (A) (select correct statement):
A. The central atom has trigonal planar geometry
B. All H-atom lie in the same plane
C. All four terminal B-H bond lengths are equivalent but that of four bridging B-H bond lengths are not equivalent
D. A three centre two -electrons bond (3c-2e) is formed by overlap of an `sp^3` hybrid orbital from each boron atom with the 1s orbital of hydrogen atom
