Match List-I (Part of Research Design) with List-II (Feature) and select the correct answer using the options given below: List-I: A. Sampling Design B. Observational Design C. Statistical Design D. Operational Design List-II: I. Concerns how many items are to be observed and how the analysis is to be done II. Deals with techniques by which procedures specified in sampling can be carried out III. Deals with the method of selecting items to be observed IV. Relates to the conditions under which observations are made

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R). Assertion (A): Though ex-post facto research examines cause and effect relationships, it is not part of experimental research. Reason (R): In ex-post facto research, the effect or change in the independent variable has already occurred and cannot be manipulated. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R). Assertion (A): In non-probability sampling, the units are selected at the discretion of the researcher. Reason (R): Non-probability samples do not require a sampling frame. In the light of the above statements, choose the most appropriate answer from the options given below: