In which of the following case (s), the offence of abetment is committed

A priest who conducts a child marriage is punishable as one who "performs, conducts, directs or abets" it under s. 10 of the Prohibition of Child Marriage Act, 2006, and those who accompany a widow to the pyre encouraging her are abettors of sati under the Commission of Sati (Prevention) Act, 1987. Merely attending a reception as a guest, without having charge of the child, is not abetment, so neither single case alone is the full answer.