下列选项中，与抗原结合后可激活补体经典途径的Ig是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29570' and id < 2404295 and id<>'2404295' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29570' and id > 2404295 and id<>'2404295' order by id asc limit 5