Select the correct statements
(i) Alkali metals from alloys amongest themselves
(ii) Alkali metals dissolve readily in mercury
(iii) The process of formation of amalgams by alkali metals is highly exothermic
(iv) The process of formation f amalgam by alkali metals is highly endothermic
A. All are correct
B. I,ii & iv only
C. I,iii & iv only
D. I,ii & iii only