Answer:
Nikita didn’t get the job because she didn’t possess the requisite skills.
Step-by-step explanation:
The word "requisite" means anything that is needed or required for anything. It would suggest the requirement, the criteria for anyone or anything to be deemed acceptable for any work or anything.
So, considering the sentences provided in the question, the proper and correct use of the word "requisite" will be in the sentence where it talks of Nikita not getting selected for the job. For it correctly uses the word in it's sentence formation.