Match List-I (Research Methods) with List-II (Descriptions) and choose the correct answer.

List-I	List-II
A. Systematic observation	I. Detailed information is gathered
B. Surveys	II. Can be used in field as well as in laboratory settings
C. Experimental research	III. Behavior is observed in a natural setting
D. Case study method	IV. Large amount of information can be acquired quickly

Correct option is B

Systematic Observation (A - III)
Definition: Involves observing behavior in a natural setting without interference.
Key Concept: Researchers systematically record real-world behaviors.
Correct match: "Behavior is observed in a natural setting" (III).

Surveys (B - IV)
Definition: A research method that collects data from many people quickly using questionnaires or interviews.
Key Concept: Efficient for gathering opinions, attitudes, and demographic data.
Correct match: "Large amount of information can be acquired quickly" (IV).

Experimental Research (C - II)
Definition: A controlled study where researchers manipulate variables to establish cause-and-effect relationships.
Key Concept: Can be conducted in both laboratory and field settings.
Correct match: "Can be used in field as well as in laboratory settings" (II).

Case Study Method (D - I)
Definition: An in-depth analysis of a single individual, group, or event.
Key Concept: Provides rich, detailed insights, often used in clinical psychology.
Correct match: "Detailed information is gathered" (I).

Since A-III, B-IV, C-II, D-I correctly match the research methods with their descriptions, the correct answer is Option 2.

Information Booster:
-Systematic Observation is non-intrusive and commonly used in ethology and developmental psychology.
-Surveys are widely used in sociology and market research due to their efficiency.
-Experimental Research allows causal conclusions by controlling variables.
-Case Studies provide deep insights but lack generalizability due to small sample sizes.
-Cross-sectional vs. Longitudinal Studies: Surveys are often cross-sectional, while case studies may be longitudinal.
-Double-Blind Experiments reduce bias in experimental research.
-Triangulation (mixing methods) improves reliability and validity in research studies.