A grandfather has 5 sons and daughters and 8 grandchildren.. They have to be arranged in arrow such that the first 4 seats and last four seats are to be taken by grandchildren and the grandfather would not sit adjacent to any of the grandchildren.

Options
- 4*6!*8!
- 4*8!*5!
- 8*4!*5!
- 5*4!*8!

CORRECT ANSWER : 4*8!*5!

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