According to the opinion of gārgya and gālāva , the augment aṭ comes before a sārvadhātuka affix consisting of single consonant, after the above five roots rud etc.,
As अरोदत्, अरोदः, अस्वपत्, अस्वपः, अश्वसत् अश्वसः, प्राणत् प्राणः, अजक्षत्, अजक्षः ॥ The names of Gargya and Galava are mentioned for honoris causa.
The mention of these names is not for the sake of \option\ (विकल्पार्थम्). Because the very injunction about अट्, would make the ईट् of the preceding sutra optional. The mention of more than one Acharya in the sutra is also for this very reason.,