Column-I	Column-II
(p) NH3	(i) Ionic hydride
(q) CaH2	(ii) Electron precise molecular hydride
(r) MaBH4	(iii) Electron rich covalent hydride
(s) CH4	(iv) Binary hydride
	(v) Complex hydride

(p)$\to$(iv); (q)$\to$(iv); (r)$\to$(v); (s)$\to$(iv) 

(p)$\to$(iii); (q)$\to$(i); (r)$\to$(v); (s)$\to$(ii) 

(p)$\to$(iii) (iv); (q)$\to$(i) (iv); (r)$\to$(v); (s)$\to$(ii) (iv)

(p)$\to$(i) (iv); (q)$\to$(ii) (iv); (r)$\to$(iii) (v); (s)$\to$(ii) (iv)