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A metal M readily forms its sulphate MS0 4 which is water soluble. It forms its oxide MO which becomes inert on heating. It forms

A metal M readily forms its sulphate MS0₄which is water soluble. It forms its oxide MO which becomes inert on heating. It forms an insoluble hydroxide M(OH)₂ which is soluble in NaOH solution. Then M is

(A) Mg

(B) Ba

(D) Be

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