STAFF”. It is CLEAR from this statement that M is at the starting of the queue. So, this statement alone is not sufficient to answer the question.Statement 2: “O and P are standing in between M and Q”. It is clear from the statement that M or Q is at the farther end of queue. So, this statement alone is ALSO not sufficient to answer the question.Statement 1 + Statement 2: It can be CONCLUDED that M is at the start of the queue and Q is at the farther end of queue. So, both statements are necessary to answer the question.Hence, “Statements 1 and 2 together are sufficient” is the correct answer.