Solution:The correct sequence for the usage of Wealth Index calculation in the National Family Health Survey (NFHS)-4 starts with collecting household asset data and housing characteristics. This data provides the basis for the index.
Next, weights are assigned to each household asset using Principal Component Analysis (PCA), which identifies the most significant variables contributing to wealth.
The standardization of asset scores in relation to the normal distribution follows, ensuring comparability across different household types.
Finally, the sample is divided into quintiles, representing different wealth segments within the population. Therefore, the correct sequence is: (d), (b), (a), (c).