सूची-I में दिए गए अनुसंधान प्रकारों को सूची-II में दी गई उनकी विशेषताओं से सुमेलित कीजिए: सूची-I (अनुसंधान प्रकार) A. अन्वेषी (Exploratory) B. वर्णनात्मक (Descriptive) C. प्रयोगात्मक (Experimental) D. अर्ध या आभासी-प्रयोगात्मक (Quasi-experimental) सूची-II (विशेषता) I. अत्यधिक नियंत्रित परिस्थितियाँ II. प्रारंभिक अंतर्दृष्टि प्राप्त करने के लिए आयोजित III. प्राकृतिक परिवेश में घटनाओं का परीक्षण और रिकॉर्ड करना IV. चरों में हेरफेर करता है लेकिन सख्त यादृच्छिक आवंटन का अभाव होता है

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: