Pandyas acknowledged the overlordship of the Cholas for about 30 years. Prantaka Viranayana was also defeated by Krishna III who was the Rashtrakuta King, in the battle of Takkolam in 949 A.D.
Tamil is the oldest with literature dating back to early centuries of Christian era. This developed during the three Sangams(assemblies of poets and writers) held during different times
Both A & B
In Southern India, the ancient Indian writings were written in four Dravidian languages which developed their own script and literature, these are, Tamil, Telugu, Kannada,Malayalam