Match the reaction give in Column I with enthalpy in Column II and choose the correct option from the codes given below.

Options

A. `{:(,,A,B,C,D),(,,1,2,1,2):}`
B. `{:(,,A,B,C,D),(,,2,1,2,1):}`
C. `{:(,,A,B,C,D),(,,1,1,2,2):}`
D. `{:(,,A,B,C,D),(,,2,2,1,1):}`

Explanation

(b) `{:(Mg rarr Mg^(2+),+,2e^(-)),(M(g)rarrM^(+)(g)+,e^(-)):}} "Ionsiation enthalpy involved"`
`{:(O rarr O^(2-)-2e^(-)),(X(g)rarrX^(-)-e^(-)):}}" Electron gain enthalpy involved"`