Concept:
Anamniotes are vertebrates whose eggs lack amnion.
Step 1:
Fishes and amphibians are anamniotes.
Step 2:
Labeo is a fish.
Hence it is anamniote.
Step 3:
• Rattus is mammal
• Crocodilus is reptile
• Columba is bird
All are amniotes.
Step 4:
Thus anamniote animal is:
\[
\boxed{\text{Labeo}}
\]
\[
\boxed{\text{Correct Option = (2)}}
\]