The correct answer is Option (2) -Ernst Mayr

Ernst Mayr, hailing from Germany, is renowned for establishing evolutionary biology as an independent field of study in the United States, earning him the epithet "Darwin of the 20th century." His contributions were instrumental in defining the modern synthesis of evolutionary theory.

Furthermore, in 1968, Biochemists Har Gobind Khorana and Marshall Warren Nirenberg were awarded the Nobel Prize in Physiology for their groundbreaking work in deciphering the genetic code of DNA.

Katherine Esau, a German-American botanist, was honored with the National Medal of Science for her significant contributions to the study of plant anatomy.