The Reasoning Ability section in the SBI PO Prelims Exam is designed to assess a candidate's logical and analytical thinking skills. This section consists of a variety of topics that test the candidate's ability to solve problems, make decisions, and analyze information. The key topics covered in this section are as follows:

1. Seating Arrangement and Puzzle:
This topic includes questions based on linear seating arrangement, circular seating arrangement, floor-based puzzles, box puzzles, etc. Candidates are required to arrange people or objects based on given conditions and form appropriate sequences or patterns.

2. Coding and Decoding:
This topic involves coding and decoding of words, numbers, or symbols based on certain patterns or rules. Candidates need to decipher the given codes and answer questions accordingly.

3. Blood Relations:
This topic tests a candidate's ability to identify and analyze the relationships between different members of a family or group. Questions may include family trees, age-based relationships, or other types of relationships.

4. Syllogism:
Syllogism involves deductive reasoning and logic, where candidates need to draw conclusions based on given statements or premises. The questions are usually in the form of statements followed by conclusions, and candidates need to determine whether the conclusions follow logically.

5. Inequality:
In this topic, candidates are required to compare quantities or conditions using inequality symbols (<,>, ≤, ≥) and identify the correct relationship between them.

6. Alphanumeric Series:
This topic includes questions based on numerical and alphabetical series. Candidates need to identify the pattern and fill in the missing element in the series.

7. Direction Sense:
Direction sense questions test a candidate's ability to understand and follow directions. The questions may involve finding the direction, distance, or position of an object or person based on given information.

8. Data Sufficiency:
Data sufficiency questions test a candidate's ability to analyze the given information and determine whether the given data is sufficient to answer the question or not.

9. Logical Reasoning:
This topic involves questions based on logical reasoning, which includes analogies, classifications, series completion, and other logical patterns.

10. Miscellaneous:
The miscellaneous category includes questions from various topics such as ranking and order, input-output, alphanumeric series, etc.

It is essential for candidates to practice and familiarize themselves with these topics to excel in the Reasoning Ability section of the SBI PO Prelims Exam. Regular practice, understanding the concepts, and solving mock tests can significantly improve performance in this section.