Which of the following distinguishes chordates from non-chordates?

Name the subphyla of the phylum Chordata.

Select the correct statements with reference to chordates.
$A$. Presence of a mid-dorsal,solid and double nerve cord.
$B$. Presence of closed circulatory system.
$C$. Presence of paired pharyngeal gill slits.
$D$. Presence of dorsal heart.
$E$. Triploblastic pseudocoelomate animals.
Choose the correct answer from the options given below:

Post-anal tail is present in

The group $Amniota$ includes:

Select the incorrect statement for chordates.