Is funeral prayer “Farz” or “Waajib”?

FUNERAL RITES-ISLAAMIC KNOWLEDGE
Is funeral prayer “Farz” or “Waajib”?
A. “Salaatul Janaazah” (funeral prayer) is “Farz-e-Kifaayah” i.e. if it is offered by only one all will be absolved of the obligation, otherwise all those who had come to know of it and did not offer, will be sinner. The denier of the “obligatory nature” of Salaatul Janaazah is an infidel. Jamaa’at is not essential for it. Even if a single person offered it, “Farz” would be accomplished.