Sampling method used in assessing immunization status of children under immunization programme is-: (A) Systemic sampling, (B) Stratified sampling, (C) Group sampling, (D) Cluster sampling
Answer is D. <p> Cluster sampling . Reference: Simple Biostatistics by Indeayan & Indrayan,1st edition,pg no:35-36 and Methods in Biostatistics by Mahajan,7 th edition,pg no:91.