Final answer:
The color of seals attached at the end of the day depends on the level of security or restriction. Without more context, it is difficult to determine the correct answer.
Step-by-step explanation:
The question is asking about the color of seals that would be attached at the end of the day if not handing over the A/C. The A/C in this context most likely refers to the Air Conditioning unit. The colors of the seals typically correspond to different levels of security or importance. In this case, without the exact context or information about the specific system, it is difficult to determine the correct answer.
However, in some security systems, red seals are used for highly restricted areas, blue seals for restricted areas, green seals for limited access areas, and yellow seals for general access areas. Therefore, based on this information, the correct answer would be red seals as they represent the highest level of security or restriction.