Which among the following is a Tamil grammatical treatise ?
[A] Pattupattu
[B] Ettutogai
[C] Silappadikaram
[D] Tolkappiam

The Tolkappiyam is a work on the grammar of the Tamil language It is written in the form of short formulaic compositions and comprises three books – the Ezhuttadikaram, the Solladikaram and the Poruladikaram.It deals with orthography, phonology, morphology, semantics, prosody and the subject matter of literature.