There are ten persons of a family L, M, N, O, P, W, X, Y, Z and V, who live on eight different floor i.e. 1st, 2nd, 3rd, 4th, 5th, 6th, 7th and 8th floor. Not more than two person lives on same floor. Also they all are sitting in two parallel rows containing five persons each, in such a way that there is an equal distance between adjacent persons. In row-1 L, M, N, O and P are seated and all of them are facing south. In row-2 W, X, Y, Z and V are seated and all of them are facing north. Therefore, in the given seating arrangement each member seated in row faces another member of the other row. All of them have relation with each other.
Only two persons sit between N's father and Z's father. Z lives on 6th floor and P lives on 4th floor. Neither M nor Z's grandfather faces Z. X lives on 8th floor. Z's husband, who lives on 1st floor, sits third to the right of Z's uncle. Y lives on 5th floor. There are two pairs of persons who live on the same floor, sit opposite to each other. W sits second to the left of Z's husband. Only one person sits between N's sister and L's brother. There are two sons and one daughter of L. The person who is facing Z's brother, who lives on 7th floor, sits immediate right of L's daughter. P is the grandmother of W and Z is the brother-in-law of P..N is the father of W and brother of M. W's grandfather, who lives on 2nd floor, is notan immediate neighbour of M. V is the husband of Z and brother of the one, who lives on 5th floor. N lives neither on 5th nor on 6th floor. N does not live on 1st floor.
In which of the following floor does W live?

Options

A. 7th floor
B. 3rd floor
C. 2nd floor
D. 6th floor

Answer

A

Explanation

First we try to complete blood relation tree from the given conditions.
Conditions are like as , N .s father and Z.s father : Neither M nor Z . grandfather faces Z. Z. husband Z . S uncle . W sites second to the left of Z .s husband . Neither M nor Z.s grandfather faces Z.Z.s husband , who lives on 1 st floor , sits third to the right of Z.s uncle . W sist between N.s sister and L.s husband . Only one person sits between N.s sister and L.s brother . There are two sons and one daughter of L. The person who is facing Z.s brother sits immediate right of L.s daughter . P is the grandmother of W and Z . O is the brother- in - law of P.N is the father of W and brother of M.W.s grandfather . V is the husband of Z and brother of the one, who lives on 5th floor , Y lives on 5th floor . Only one person sits between N.s sister and L.s brother.
By using these conditions , we can draw a blood - relation diagram.

Now , we try to complete linear arrangement from using given conditins and with the help of blood -relation tree. Z.s husband who lives on 1st floor , sits third to the right of Z.s uncle . W sits second to the left of Z .s husband . The person who is facing Z.s brother , who lives on 7th floor , sits immediate right of L.s daughter .W.s grandfather who lives on 2nd floor , is not an immediate neighbour of M. Only two persons sit between N.s father and Z .s father . There can be two possibilities by using these conditions .

From the other conditions , neither M nor Z .s grandfather face Z. Hence Case - 2 is eliminated and Case -1 is continued .
Only one person sits between N.s sister and L .s brother Y lives on 5 th floor . Z lives on 6th floor and P lives on 4th floor . X lives on 8 th floor. There are two pairs of person who lives on the same floor, sit opposite to each other . N lives neither on 5th nor on 6th floor.
we get final arrangement -