In how many different number of ways 4 boys and 3 girls can sit on a bench such that girls always sit together?  Answers:
A) 720 B) 740 C) 760 D) 790 E) 800
Option '720'
<result>A</result>
In how many different number of ways 4 boys and 3 girls can sit on a bench such that girls always sit together?