Task: Question Answering
Input (English): Question: Liquid chromatography using linked stationary phases can be divided into normal phase and reverse phase phases. In this context it can be said that: 
 Options:  <1> The main separation mechanism in reverse phase is the distribution, while adsorption also plays a very important role in the normal phase. <2> In normal phase chromatography, a large number of non-polar stationary phases can be used. <3> The main separation mechanism in normal phase is the distribution, while the adsorption plays a very important role in the reverse phase. <4> In reverse phase chromatography, the stationary phase is polar and the non-polar eluents. <5> In reverse phase chromatography, a large number of polar stationary phases can be used.
Output (English): 1