The question given below consists of three statements

Solution

From statement I alone, only four boxes are between L and Q. R is two boxes above Q. Only three boxes are between O and R. P is above N, which is above M. We get: So, from statement I alone, we get no box is between N and R. Thus, data given in statement I alone is sufficient to answer the question. From statement II alone, only one box is below M. Only three boxes are between M and L. O is three boxes above N. R is two boxes above Q. P is neither the topmost box nor the bottommost box. We get: So, from statement II alone, we get that either no box or five boxes are between N and R. Thus, data given in statement II alone is not sufficient to answer the question. From statement III alone, P is above Q. Only five boxes are between Q and O. Only two boxes are between M and P. M is two boxes below N. L is above R. We get: So, from statement III alone, we get that either no box or two boxes are between N and R. Thus, data given in statement III alone is not sufficient to answer the question. Therefore, data given in statement I alone is sufficient to answer the question.