Question

Seven boxes J, K, L, M, N, O and P are kept one above another such that bottommost box is numbered as 1 and topmost box is numbered as 7. At least four boxes are above
L. There are only three boxes between L and P. N is four boxes above J. M is immediately below J. K is immediately above O. Which box is kept fourth from the top?

A O
B P
C K
D J
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