Task: Question Answering
Input (English): Question: The characteristic Rovsing sign in acute appendicitis consists of: 
 Options:  <1> Pain in the epigastric pressure when applying a firm and persistent pressure on McBurney's point. <2> Acute pain that appears when the appendix is ​​compressed between the abdominal wall and the iliac crest. <3> Passive rebound sensitivity in the abdominal wall. <4> Loss of abdominal sensation when contracting the muscles of the abdominal wall. <5> Pain at McBurney's point when compressing the lower left quadrant of the abdomen.
Output (English): 5