Task: Question Answering
Input (English): Question: What is the biosynthetic route of terpenes in plants ?: 
 Options:  <1> They are synthesized by the mevalonic acid route or by the fatty acid route. <2> They are synthesized by the mevalonic acid route or by the deoxy-xylulose phosphate (DOXP) pathway also called GAP / Pyruvate. <3> They are synthesized by the mevalonic route and the sikimico route. <4> They are synthesized by the sikimic acid route or by the deoxy-xylulose phosphate (DOXP) pathway also called GAP / Pyruvate. <5> They are synthesized by the polyacetate route.
Output (English): 2