Which of the followings are true? a. There is a direct relationship between size of the body part and the area on the somatosensory cortex.
b. There is an inverse relationship between size of the body part and the area on the somatosensory cortex.
c. There is a direct relationship between the number of receptors on the body part and the area on the somatosensory cortex.
d. There is an inverse relationship between the number of receptors on the body part and the area on the somatosensory cortex.