Concept:This problem requires arranging the five persons in a single vertical order from the topmost flat to the bottommost flat based on the given statements.
Explanation:Mr. M lives in a flat above Mr. A, so M is higher than A.
Mr. A lives in a flat above Mr. G, so A is higher than G.
Combining these two clues, the order from top to bottom so far is: Mr. M, Mr. A, Mr. G.
Mr. L lives in a flat below Mr. G, so L must be placed below G.
Mr. R lives in a flat below Mr. L, so R must be placed below L.
Now joining all the relations, the complete top-to-bottom arrangement is: Mr. M, Mr. A, Mr. G, Mr. L, Mr. R.
Since Mr. M is at the first position in this arrangement, he occupies the topmost flat.
Answer:Mr. M lives in the topmost flat, which is Option C.