भारतीय अर्थव्यवस्था में श्रम और रोजगार के संबंध में कौन-सी एक प्रमुख चुनौती है?

Which of the following is the best measure to analyze the shift of workers from the Primary Sector (Agriculture) to the Tertiary Sector (Services), illustrating the change in the structural composition of employment?

Concerning the National Sample Survey Office (NSSO)'s Periodic Labour Force Survey (PLFS) data and its relevance to measuring structural change, choose the correct option from the statements below: Statement I: The Usual Principal and Subsidiary Status (UPSS) method captures the employment status of a person over a long reference period (365 days) and is a reliable measure for tracking long-term shifts in sectoral employment structure. Statement II: Recent trends in the Indian economy show a significant rise in the percentage of the workforce engaged as Casual Labour, indicating a widespread increase in the formalization of employment. Statement III: The structural shift in India's employment is marked by a notable decline in the share of Self-Employed individuals in the Agriculture sector, with the resulting labour moving primarily into regular wage/salaried employment in the Secondary Sector.