In how many different number of ways 4 boys and 3 girls can sit on a bench such that girls always sit together.
Choose the correct choice from the following answers:
A) 720
B) 730
C) 740
D) 780
E) 790
720   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.