Categorise the following according to their property:
Answer variants:
\(-NH_2\)
\(-CH_2-CH_4\)
\(C\equiv C\)
Eth-
\(-CHO\)
Ben-
1. Class of compounds and its functional group:
 
Aldehyde -
 
2. Root words of hydrocarbons:
  
\(2\) -
 
3. Prefix for IUPAC Name:
 
Amino -