Access to the marking scheme or evaluation criteria mentioned in the answer key for the RBI Grade B Exam is not available to the general public. The Reserve Bank of India (RBI) is responsible for conducting the Grade B Exam and they do not disclose the detailed marking scheme or evaluation criteria to the public. However, candidates can still get an idea of how their papers are evaluated by following these steps:

1. Review the Syllabus and Exam Pattern:
Candidates should thoroughly study the official syllabus provided by the RBI for the Grade B Exam. The syllabus will give a clear understanding of the topics and subjects that will be covered in the exam. Additionally, candidates should also familiarize themselves with the exam pattern, which includes the number of questions, marking scheme, and time duration for each section.

2. Analyze Previous Year Question Papers:
Candidates should carefully go through the previous year question papers as they can provide valuable insights into the pattern of questions and the level of difficulty. By analyzing the question papers, candidates can identify the important topics and understand the depth of knowledge required for each subject.

3. Understand the Scoring System:
While the exact marking scheme may not be available, candidates should have a general understanding of the scoring system. It is important to know how many marks are allocated to each question and whether there is negative marking for wrong answers. This knowledge will help candidates in managing their time effectively and making educated guesses when necessary.

4. Focus on Conceptual Clarity:
Instead of solely relying on the marking scheme or evaluation criteria, candidates should focus on developing a strong conceptual understanding of the topics. This will ensure that they can answer questions accurately and confidently, regardless of the specific evaluation criteria.

In conclusion, the marking scheme or evaluation criteria mentioned in the answer key for the RBI Grade B Exam are not accessible to the public. However, candidates can still prepare effectively by studying the official syllabus, analyzing previous year question papers, understanding the scoring system, and focusing on conceptual clarity.