The following questions are based on the diagram given below showing four persons stationed at the four corners of a square piece of plot as shown.

From the original position given in the above figure, A and B move one arm length clockwise and then cross over to the comer diagonally opposite, C and D move one arm.length anti-clockwise and cross over the corner diagonally opposite. The original configuration ADBC has now changed to

Options

A. CBDA
B. BDAC
C. DACB
D. ACBD

Answer

A

Explanation

In Fig., `A_1 , B_1, C_1` and `D_1` are original positions of A, B, C & D. `A_2,B_2,C_2` and `D_2` are positions after 1st movement of A, B, C and D. `A_3,B_3, C_3` and `D_3` are final positions

Therefore, the final configuration of ADBC has now CBDA.
Alternate Solution :
Fig., (i), (ii), (iii) & (iv) show the movements of A, B, C and D respectively.
The new arrangement is shown in Fig.

Therefore, original configuration A, D, B, C has changed toC, B, D, A.