There are many forms of the letters N .
Only the first one displayed is ususally used .
Some are more nasal than others .
It is only important to know about them because you might come across them .
Remember only the first one is actually used a lot.
Unlike other Hindi letters these have two syllables and are probably derived from Sanskrit.
The first is soft t ......and r ....combined tr
as in Yatra
as in Rishi (holy man )
The next is sh.... and r.... combined shr
as in Shrap (curse)
as in Gyan (knowledge)