In $Pheretima$,the gizzard is responsible for..........

Identify the incorrect statements among the following:
$(a)$ In earthworm,a single male genital pore is present.
$(b)$ Setae help in locomotion of earthworm.
$(c)$ The muscular layer in the body wall of earthworm is made up of only circular muscles.
$(d)$ Typhlosole is a part of the intestine of earthworm.

Identify the correct sequence of organs in the digestive system of an earthworm.

Earthworms are:

The first segment of the earthworm is called:

If the dental formula of Rabbit is $2033/1023$,what does it show?