Study the following information to answer the given questions.
Input: 46, 185, 310,436, 96, 217, 39
Step I: 436, 46, 185,310,96,217,39
Step II: 436, 39, 46, 185,310,96,217
Step III:436, 39, 310,46, 185,96,217
Step IV: 436,39,310,46, 217, 185,96
Step V: 436,39,310,46, 217,96,185
This is the final arrangement and Step V is the last step for this input.
Following is the step IV for an input. What will be the first step for the input?
Step IV: 726, 19, 537, 33,412, 315, 115, 47, 81

Options

A. `115, 47, 726, 19, 537, 33, 412, 315, 81`
B. `537, 19, 726, 412, 33, 315, 115, 47, 81`
C. `33, 412, 315, 726, 19, 537, 115, 47,81`
D. Cannot be determined

Answer

D

Explanation

Here, the rule followed is: The numbers are getting arranged in alternate series, one in descending order and the other in ascending order.
Step 1: The largest of the given numbers comes to the place of first number and the rest shift rightward.
Step II: The smallest of the given numbers comes to the place of second number and the rest shift rightward.
Step III: The second largest of the given numbers comes to the place of third number and the rest shift rightward.
Step IV: The second smallest of the given numbers comes to the place of fourth number and the rest shift rightward and so on until the alternate series is formed.
Previous step can.t be determined.