In how many ways 6 boys and 4 girls can be seated in a row so that they are alternative?	Choose the correct choice:
A) 14420
B) 12620
C) 17280
D) 21200
E) 24560

Rationale: "6 boys can be seated in 6 ! 4 girls can be seated in 4 ! required number = 6 ! 4 ! = 17280 answer is c"
Answer: C