Step 1: Concept
Total circular arrangements of $n$ people is $(n-1)!$.
Step 2: Analysis
Total arrangements of 10 people $= 9! = 362880$.
Let the 3 special people (2 boys, 1 girl) be one unit.
Arrangements where they are together $= (8-1)! \times 3! = 7! \times 6 = 5040 \times 6 = 30240$.
Step 3: Calculation
Ways where they are NOT together $= 362880 - 30240 = 332640$.
Step 4: Conclusion
Hence, the number of ways is 332640.
Final Answer: (C)