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(C) In earthworms,nephridia are classified based on their location and the way they discharge waste:$1$. Septal nephridia $(P)$ are present on both si

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$(P-I), (Q-II), (R-I)$

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(C) In earthworms,nephridia are classified based on their location and the way they discharge waste:$1$. Septal nephridia $(P)$ are present on both sides of the intersegmental septa of segment $15$ to the last. They discharge their waste into the intestine,hence they are enteronephric $(I)$.$2$. Integumentary nephridia $(Q)$ are attached to the lining of the body wall of segment $3$ to the last. They discharge their waste directly to the exterior,hence they are exonephric $(II)$.$3$. Pharyngeal nephridia $(R)$ are present as three paired tufts in segments $4, 5,$ and $6$. They discharge their waste into the alimentary canal,hence they are enteronephric $(I)$.Therefore,the correct matching is: $P-I, Q-II, R-I$.

Column-$I$	Column-$II$
$P$. Septal nephridia	$I$. Enteronephric
$Q$. Integumentary nephridia	$II$. Exonephric
$R$. Pharyngeal nephridia

Match the following columns regarding the types of nephridia in earthworms:

Column-$I$ Column-$II$

$P$. Septal nephridia $I$. Enteronephric

$Q$. Integumentary nephridia $II$. Exonephric

$R$. Pharyngeal nephridia

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Match the following columns regarding the types of nephridia in earthworms: Column-$I$ Column-$II$ $P$. Septal nephridia $I$. Enteronephric $Q$. Integumentary nephridia $II$. Exonephric $R$. Pharyngeal nephridia