Answer : Option 1) Rigor mortis.
Explanation : The parameter of rigor mortis reaches a maximum at 12 hours and is found to be gone within 36 to 48 hours.
Rigor mortis where rigor means stiffness and mortis means of death or in simple words it is postmortem rigidity, the third stage of death, is one of the major recognizable signs of death, which is mainly caused by chemical changes in the muscles post mortem, and it causes the limbs of the corpse to stiffen.
In humans, rigor mortis can occur as soon as 4 hours post mortem.
