What clinical symptoms are characteristic during the initial phase of acute radiation sickness?

Answer options

1. Hair loss, neurological symptoms that gradually even out, sharp deterioration of wellbeing, increased body temperature
2. Normalization of temperature, improvement of wellbeing, increased appetite, cessation of bleeding
3. Nausea, vomiting, increased body temperature, spastic abdominal pain, deterioration of wellbeing
4. Nausea, vomiting that intensifies after drinking fluids, loss of appetite, headache, general weakness, drowsiness
5. Hemorrhages in the skin, mucosa, gastrointestinal tract, brain, heart, and lungs (hemorrhagic syndrome), loss of appetite, diarrhea (dyspeptic disorders)