Task: Question Answering
Input (English): Question: In a flight time analyzer in mass spectrometry: 
 Options:  <1> Ions with low m / z or lighter values ​​arrive more quickly at the detector. <2> Ions with high m / z or heavier values ​​arrive more quickly at the detector. <3> The ions do not reach the detector. <4> Ions with odd m / z ratio arrive more quickly at the detector. <5> The analysis time that is usually required is seconds.
Output (English): 1