1.3.2 उपदेशे अजनुनासिक इत्

Nasal अच् in उपदेश is इत्.  Panini had considered सूत्रपाठ,धातुपाठ, उणादिपाठ, गणपाठ and लिङ्गा नुशासनपाठ  as उपदेश. वार्तिकपाठ is also considered as उपदेश.