Correct option is D
A. Simple Random Sampling → II. Every sample element is selected independently from the population
This is the definition of simple random sampling where each unit has an equal and independent chance of being selected.
B. Non-Probability Sampling → IV. Selection of sample unit depends on the personal judgment
Non-probability sampling includes techniques like purposive or judgmental sampling where the researcher uses their discretion.
C. Cluster Sampling → I. Population is divided into group of elements
In cluster sampling, the population is divided into clusters (usually geographically), and entire clusters are randomly selected.
D. Systematic Sampling → III. Elements are selected by picking a random starting point and then choosing every ith element
Systematic sampling involves selecting every kth item from a list after a random start.