Identify the correct statement.

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(B) $1$. Ladybird is a beetle (insect),not a bacterium. So,option $A$ is incorrect.$2$. Antibiotics have significantly improved the treatment of deadl

Vedclass · Accepted Answer

Antibiotics have greatly improved the treatment of diseases like plague,whooping cough,diphtheria,and leprosy.

Vedclass · Answer

(B) $1$. Ladybird is a beetle (insect),not a bacterium. So,option $A$ is incorrect.$2$. Antibiotics have significantly improved the treatment of deadly diseases such as plague $(Black Death)$,whooping cough $(Kali Khansi)$,diphtheria,and leprosy $(Kusth Rog)$. So,option $B$ is correct.$3$. Biogas plants produce a mixture of gases,primarily $CH_4$ (methane),$CO_2$ (carbon dioxide),and $H_2$ (hydrogen),not $H_2S$ as the primary component. While trace amounts may exist,the standard composition is $CH_4, CO_2,$ and $H_2$. Thus,option $C$ is technically less accurate than $B$.$4$. Microbes (methanogens) are essential for biogas production. So,option $D$ is incorrect.Therefore,the most accurate statement is $B$.

Column-$I$	Column-$II$
$1$. Trichoderma	$a$. Quantum-$4000$
$2$. Pseudomonas	$b$. Free-living biocontrol fungus
$3$. Baculovirus	$c$. Resistant to crop-sucking pests
$4$. Bt Cotton	$d$. Pathogenic to insects and some arthropods

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Column-$I$ Column-$II$

$1$. Trichoderma $a$. Quantum-$4000$

$2$. Pseudomonas $b$. Free-living biocontrol fungus

$3$. Baculovirus $c$. Resistant to crop-sucking pests

$4$. Bt Cotton $d$. Pathogenic to insects and some arthropods

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