Boranes

As the name indicates, boranes are hydrides of boron. They are colourless compounds with a special property that it is diamagnetic. It is important to note that there are 3 classess of boranes. Do you know which are they?
Classess of boranes:

1. Nido-boranes
2. Arachno-boranes
3. Conjuncto-boranes

The above mentioned borane classess are represented by a general formula.

General formula of borane classess:

1. Nido-boranes: B_nH_n+4
2. Arachno-boranes :B_nH_n+6
3. Conjuncto-boranes: B_nH_m