The following compounds have been arranged in order of their increasing thermal statbilties . Identify the correct order .
`K_(2)CO_(3) (I)" "MgCO_(3) (II)`
`CaCO_(3) (III)" "BeCO_(3) (IV)`

Options

A. `I lt II lt III lt IV`
B. `IV lt II lt III lt I`
C. ` IV lt II lt I lt III`
D. ` II lt IV lt III lt I`

Answer

C

Explanation

The stability of carbonates increases with increasing electropositive character of metal .