Step 1: Understanding the Concept:
Various mathematical models and graphical methods have been developed in fish stock assessment to analyze size frequencies and estimate yield.
Step 2: Detailed Explanation:
Let us match the scientific methods with their authors:
- A. Bhattacharya (1967): Developed a famous graphical method for the Separation of cohorts (II) from a mixed length-frequency distribution.
- B. Alagaraja (1984): Proposed the Relative response model (III) for stock assessment.
- C. Beverton and Holt (1956): Formulated the classic Yield per recruit model (IV) (analytical model).
- D. Jones (1984): Developed the Length-based cohort analysis (I) (or Jones' Length Cohort Analysis, LCA).
The correct matching is: A - II, B - III, C - IV, D - I.
Step 3: Final Answer:
This matches option (A).