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5. We remark here that if the neutrino is described by a two-component theory (see Section III) then the result of the large angular asymmetry in Co60 decay establishes in a trivial way the non-invariance property of jS-decay under the charge con jugation operation. However, this non-invariance property can also be proved under a much wider framework. In this section we take as an example the case of a 4-component theory of neutrino to illustrate such a proof.