Understanding the Question: Verbal roots in Sanskrit are listed in a catalog called the Dhātupāṭha. These roots are not listed randomly; they are grouped into classes. The question asks for the total number of these classes.
Key Concepts and Approach: Roots are grouped into Gaṇas based on how they behave when forming the present tense. Each class uses a specific "conjugational sign" (Vikaraṇa) to join the root to the ending.
Detailed Solution:
Step 1: Total Count. There are exactly 10 Gaṇas or classes of verbal roots in the traditional system.
Step 2: Major Classes. These include the Bhvādi-gaṇa (the largest class), Adādi, Juhotyādi, Divādi, Svādi, Tudādi, Rudhādi, Tanādi, Kryādi, and Curādi.
Step 3: Grammatical Significance. Knowing the Gaṇa of a root is essential to know which middle-infix (Vikaraṇa) to apply. For example, Bhvādi roots add 'a', while Divādi roots add 'ya'.
Conclusion: There are 10 Gaṇas.