किस समाजशास्त्री ने संदर्भ समूहों (Reference Groups) को व्यवस्थित रूप से 'सकारात्मक' और 'नकारात्मक' संदर्भ समूहों में वर्गीकृत किया है?

Which German sociological term, prominently used by Max Weber, means to empathetic understanding or comprehending the subjective meaning of social action?

Match LIST-I with LIST-II: LIST-I (Sociologist) A. Albion Small B. Charles Horton Cooley C. Ferdinand Tönnies D. W.G. Sumner LIST-II (Sociological Concept/Definition) I. In-Group and Out-Group dynamics II. Gemeinschaft and Gesellschaft III. Primary and Secondary groups IV. Group relations demanding collective recognition Choose the correct answer from the options given below: