Multistage stratified random sampling is a type of probability sampling. In this method, the population is divided into different strata or groups, and then random samples are taken from each stratum. The process may involve multiple stages. For example, the first stage might involve dividing the population into different regions, and the second stage could involve dividing those regions into smaller groups. At each stage, a random sample is chosen.
Since every individual in each stratum has a known and non-zero chance of being selected, this makes the sampling method probability sampling.
Answer: (a) Probability Sampling