Let’s evaluate the decisions:
1) Did not hold an appraisal meeting with Vipul to review his performance: This is unjust because an employee should be given a chance to talk about his achievements and grievances. However, there is a possibility that appraisal was done by filling appraisal forms virtually. So, there is an element of uncertainty here and we can place it before 2.
2) Gave a 5% hike, which was given to everyone in the company, to Vipul: 5% looks unjust because the given context talks about Vipul being a promising employee but since 5% is company wide, this decision is not unjust. Hence, 2 comes at the end.
3) Gave a 15% hike to Reena: Given that Reena was on PIP and the company wide hike percentage is 5%, this is the most unjust decision.
Hence, the correct sequence is 3, 1, 2 and the correct answer is C.