<prompt> Post moem lividity persists till :24 hours18 hours2-3 daysMerges with putrefactive changes  <response>: D i.e. Merges with putrefactive changes - Postmoem lividity also ka suggilation, vabices, hypostasis, staining, darkening of death is an early sign of death commences within an hour of death.Q - Fixed in about 4 - 6 hoursQ; reaches maximum between 6-12 hoursQ and persists until putrefaction sets in.Q Lividity does not develop in drowning in running water areas of contact flattening.Q When lividity first develops i.e. before fixing, on applying firm pressure it disappears releasing pressure it reappears Difference from bruise. 