An organic compound A reacts with sodium metal and forms B. On heating with conc. H2SO4, A gives diethyl ether. So A and B are                                                              [AFMC 1998]

(a) C3H7OH and CH3ONa

(b) CH3OH and CH3ONa

(c) C4H9OH and C4H9ONa

(d) C2H5OH and C2H5ONa

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