Column I A. Ladybird B. Mycorrhiza C. Biological control D. Biogas | Column II i. Methane bacterium ii. Trichoderma iii. Aphids iv. Glomus |
Solution: The ladybird beetle is a biological pest control agent for aphids. Glomus is a genus of arbuscular mycorrhizal fungi that create a mycorrhizal symbiotic association with plant roots. Trichoderma is a biological control agent used to combat pathogenic fungi of several species. Biogas is made up of methane, which is produced by methane bacterium. So, the correct answer is option (b).