The correct option is B 2 only
The main emphasis in Carnatic music is on vocal music; most compositions are written to be sung, and even when played on instruments, they are meant to be performed in gāyaki (singing) style. Thus lyrics is given higher prominence.
The mridangam is a percussion instrument of ancient origin. It is the primary rhythmic accompaniment in a Carnatic music ensemble, and in Dhrupad, where the same instrument is referred to as pakhawaj.