Which one of the following are the species that are crossed to give sugarcane varieties with high sugar, high yield, thick stems and ability to grow in the sugarcane belt of North India?
Saccharum robustum and Saccharum officinarum
Saccharum barberi and Saccharum officinarum
Saccharum sinense and Saccharum officinarum
Saccharum barberi and Saccharum robustum
