Which of the following is an incorrect relationship?

What is reflex action?

Identify $a, b,$ and $c$ from the figure.

Which sentences are $WRONG$ about acquired reflex action?
$I$. These are non-heritable.
$II$. These are permanent.
$III$. They may disappear or re-appear.
$IV$. Example is knee jerk.

$A$ boy learns typewriting and harmonium at the same time. He finds harmonium more easy to learn. This is:

If a frog's brain is crushed,even then its leg moves upon pinpointing. This is called: