When simon levay examined interstitial nucleus 3 in 41 people who had died, he found that in the homosexual males in his sample, this nucleus was a. comparable in size to the whole group of heterosexual males b. comparable in size to the heterosexual males who had died of aids c. larger, but only in those who had died of aids d. comparable in size to the heterosexual females?

The answer is: d. comparable in size to the heterosexual females
Simon LeVay is a neuroscientist that studies the relation of brain structure and sexual orientation. He examines the interstitial nucleus of anterior hypothalamic cells. The size of the nucleus in homosexual is found to be similar to women while the heterosexual male is much larger. The result doesn't enough to say that sexual orientation is genetic. This proves that there is the dimorphic nucleus in different sexual orientation.