Select the mismatched pair from the following | vedclass

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Question

(C) The correct answer is $C$. $1$. Methanogens are archaebacteria that produce methane in anaerobic conditions,commonly used in biogas production. $2

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Spirochetes - Gram-positive bacteria

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(C) The correct answer is $C$. $1$. Methanogens are archaebacteria that produce methane in anaerobic conditions,commonly used in biogas production. $2$. Halophiles are archaebacteria that thrive in extremely salty environments. $3$. Spirochetes are a phylum of Gram-negative bacteria that have long,helically coiled cells. Therefore,the statement that they are Gram-positive is incorrect. $4$. Cyanobacteria are photosynthetic autotrophs containing chlorophyll $a$,similar to green plants.

Column-$I$	Column-$II$
$A$. Halophiles	$i$. Gram-negative bacteria
$B$. Thermoacidophiles	$ii$. Extremely salty areas
$C$. Spirochetes	$iii$. Responsible for methane production
$D$. Firmicutes	$iv$. Acidic and high temperature environments
	$v$. Gram-positive bacteria

Select the mismatched pair from the following.

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