Assertion Alkaline earth metals dissolve in liquid ammonia to give a blue-black coloured solution.
The blue-black colour of the solution is due to the presence of ammoniated electrons.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true
or (E) Both A and R are false.