Praudhamanorama p115

p115

If it is objected that in paramadaṇḍinau and the like, nuṭ would occur because it has the status of a pada due to the internal case ending, this is not so, because of the prohibition of operation based on an affix by "uttarapadatve cāpadādividhau". For this very reason, velar substitution, gh-substitution, ḍh-substitution, and so forth do not occur in paramavācau, paramagoduhau, paramalihau, etc. As for what the older grammarian said—that ṅamuṭ does not occur because of the explanation that it is a pada beginning with an ac, continuing "pade" from "uñi ca pade" (Pā. sū. 8.3.21)—that is refuted by this [same reasoning], since even by him the previously mentioned manner must be followed in order to ward off the elision of n right here.