What would be the equivalent pointer expression for referring the array element ar[ m ][ n ][0]

1. A* (* (* (ar) +m+n)+0 )
2. B(* (* (*ar + m) + n) + o)
3. C( * (* (ar+m)+n)+o)
4. D*(*(*(ar+m)+n)+0)

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Correct answer: D. *(*(*(ar+m)+n)+0)

Explanation

ar[i] is *(ar + i), applied once per dimension: ar[m][n][0] = *(*(*(ar + m) + n) + 0).