Ramona is a woman and Stefan is a man. Which of the following statements is true regarding the potential differences in the corpus callosum between these two individuals?
1) The corpus callosum is larger in Ramona compared to Stefan.
2) The corpus callosum is larger in Stefan compared to Ramona.
3) There are no potential differences in the corpus callosum between Ramona and Stefan.
4) The potential differences in the corpus callosum between Ramona and Stefan cannot be determined.