Answer:
Primates have the greatest brain size to body size ratio of any mammalian group.
Step-by-step explanation:
Primates can be described as mammals which have digits. Apart from having digits, primates comprise of features like skull and teeth. Primates undergo sexual reproduction to produce offsprings and are characterized of being placental mammals.
Primates are organisms that have the largest size of the brain tin relation to their body ratio. Among primates, Humans have the largest brain to body size ratio, making them by far the most intelligent organism in the animal kingdom.