Statement -I: Natural rubber gives 2-methyl-1, 3-butadiene when it is heated to high temperature in the absence of airStatement-II: Natural rubber is poly isoprene

Natural rubber is polymer of isoprene (2-methyl -1, 3-butadiene) on heating in absence of air it gives isoprene. When heating in presence of air it gives CO2 and H2O.