Step 1: About Vakyapadiya.
The Vakyapadiya is a famous work on the philosophy of language and grammar.
It belongs to the school of sphota theory, which emphasizes the unity of meaning in speech.
Step 2: Author identification.
The author of this work is Bhartriharih, a renowned Sanskrit grammarian and philosopher.
He explained how words and sentences convey meaning through the concept of 'sphota'.
Step 3: Eliminating other options.
- Patanjalih: Known for the Mahabhashya, not Vakyapadiya.
- Nagojibbhattah: A later commentator, not the original author.
- Paninih: Author of Ashtadhyayi, not Vakyapadiya.
Step 4: Conclusion.
Therefore, the author of Vakyapadiya is Bhartriharih.