Answer: A) TRUE Explanation: फुफ्फुस स्थान में वायु या गैस का निर्माण हो सकता है और जब ऐसा होता है, तो इसे न्यूमोथोरैक्स कहा जाता है। अतः दिया गया कथन सत्य है।

Answer: A) symbolic interactionism Explanation: There are two types of sociological theories: 1. Macro and 2. Micro. Macro theories focus on the society as a whole and aim at establishing the general characteristics of the society. It is basically looking at the society as a whole and looking at a bigger picture. It aims to answer three basic questions: 1) What holds the societies together? 2) What are the sources of conflict in a society? 3) How do societies change? There are two branches of macro-sociological theories: consensus and conflict, with the main representative being functionalist and marxist respectively.   Micro theories on the other hand, focus on the individuals who make up the society unlike macro theory which looks at the society as a whole. Micro theories are small scale. Consider it a magnifying glass, when you look through it, you 'zoom' in to the society and see the individuals who have made up that particular society.   Symbolic interactionism is the sociological perspective which is most closely linked to microsociology.

Answer: D) 165 Explanation: Ratio C1:C2 = 3:5 and C2:C3 = 7:11So C1:C2:C3 = 21 : 35 : 55Let the strength of three classes are 21x, 35x and 55x respectively, then Given that 21x + 35x + 55x = 333=> 111x = 333 or x=3So strength of the class with highest number of students =55x = 55x3 = 165.