Answer: Option 'A' is true.
Step-by-step explanation:
Since we have given that
All dogs are warm blooded.
It means Dogs ⇒ Warm blooded ---------------------(1)
and
All warm blooded creatures are mammals.
Warm blooded ⇒ mammals --------------------- (2)
So, from Eq(1) and Eq(2), we get that
Dogs ⇒ mammals
⇒ All dogs are mammals.
Hence, Option 'A' is true.
