In UP (09), seat numbers must not repeat in the same room. Which set is valid?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is 901111, 901112, 901113, 901114.
As per the question condition, seat numbers in the same room must not be repeated (i.e., all numbers in the set must be different/unique).
Let's check all the options:
901002, 901002, 901023, 901023 ➔ Here both the numbers 901002 and 901023 are repeated twice. (Invalid)
901005, 901023, 901011, 901023 ➔ Here the number 901023 is repeated twice. (Invalid)
901111, 901112, 901113, 901114 ➔ All four numbers in this set are completely different and none of the numbers are repeated. (Valid)
901021, 901031, 901021, 901041 ➔ Here, the number 901021 is repeated twice. (Invalid)
Therefore, only the third set is completely valid.