- Statement 1: Quaternary sector involves knowledge-based services like research, information technology, education, etc. Workers in these roles are typically highly skilled professionals and are commonly referred to as white-collar workers. This statement is correct. - Statement 2: Quinary sector involves the highest level of decision-making in an economy or society (e.g., top executives, government leaders, leading researchers). Workers in these roles are often referred to as gold-collar workers. This statement is correct. - Statement 3: Tertiary sector involves services (retail, healthcare, education, finance, etc.). Pink-collar worker is a term specifically used for service jobs traditionally held by women, often perceived as lower-paid (e.g., nursing, teaching, retail). While not all tertiary workers are pink-collar (many are white-collar), some sources or simplified classifications might broadly associate the service sector with pink-collar work. Assuming this loose association is intended, statement 3 is considered correct in this context. - Statement 4: Primary sector involves extraction of raw materials (agriculture, mining, fishing, forestry). Red-collar worker is a term specifically used for primary sector manual labour. Blue-collar worker is typically associated with manual labour in manufacturing and industrial jobs (Secondary sector), although it is sometimes used more broadly to include manual labour across primary and secondary sectors. Using the more precise definition, primary sector workers are 'red-collar', making statement 4 incorrect.