The correct option is C A - Saccharum barberi, B - Saccharum officinarum
Saccharum barberi is a sugar cane variety grown in north India. It has poor sugar content and yield. So, blank A is Saccharum barber.
Saccharum officinarum is a sugar cane variety that is grown in south India. It has thicker stems and higher sugar content but it does not grow well in north India. So, blank B is Saccharum officinarum.
Saccharum sinense is a species of sugar cane from China. It is a more primitive variety of sugarcane. It has lesser sugar content than the more modern varieties derived from it.