Which of the following snakes is not poisonous?

Which of the following is a correct matching set?

Match the branches of science in List-$1$ with their respective fields of study in List-$2$. Select the correct option from the given codes.

List-$1$ (Branch of Science)	List-$2$ (Field of Study)
$a$. Mycology	$p$. Study of birds
$b$. Ornithology	$q$. Study of worms
$c$. Herpetology	$r$. Study of fishes
$d$. Ichthyology	$s$. Study of fungi
	$t$. Study of reptiles/amphibians

Which of the following pairs are correctly matched?

Animals	Morphological features
$(i)$ Crocodile	$4$-chambered heart
$(ii)$ Sea urchin	Parapodia
$(iii)$ Obelia	Metagenesis
$(iv)$ Lemur	Thecodont

Match the following list of animals with their level of organisation and choose the correct sequence.

Column $I$	Column $II$
$A$. Organ level	$p$. Pheretima
$B$. Cellular aggregate level	$q$. Fasciola
$C$. Tissue level	$r$. Spongilla
$D$. Organ system level	$s$. Obelia

Which of the following is incorrect?