- Statement (i) is correct: Pressure groups, by definition, are organizations formed to influence government policies and actions to promote their specific interests. - Statement (ii) is incorrect: Pressure groups advocate for their own specific interests. While some of these interests may align with or benefit the wider society, their primary goal is not necessarily to provide common benefits to society as a whole. They may even pursue goals detrimental to others. - Statement (iii) is generally correct: While not the only factor, the number of members can significantly enhance a pressure group's ability to influence the government, especially in a democracy, through means like voting strength, mobilization for protests or campaigns, and demonstrating a large base of support or opposition. - Statement (iv) is questionable: State- centered theories of policy making emphasize the autonomy and power of the state bureaucracy relative to societal groups. They don't primarily focus on whether pressure groups lack popular support, but rather on the state's ability to act independently of or shape such group pressures. The statement is not a standard characterization of state-centered theory regarding pressure groups. Considering the options, (i) and (iii) form the most plausible pair of correct statements describing common aspects of pressure groups and their methods of influence.