The correct option is C Jeffreys et al
Jeffreys
Alec Jeffreys invented the DNA fingerprinting technique in 1984. He is considered as the father of DNA fingerprinting.
Schleiden and Schwann
Schleiden and Schwann gave cell theory which explains that every living organism is composed of cells. Further, it also mentions that the cell is the basic structural and functional unit of life.
Boysen and Jensen
Boysen and Jensen experimentally showed that when a plant is exposed to sunlight, the coleoptile region of the shoot is responsible for controlling the growth of the shoot. It was built upon investigations by Darwin.
Edwards and Steptoe
Edwards and Steptoe developed a culture media for in vitro fertilisation (IVF) to treat infertility in humans.
Final answer
(A) Jeffreys et al.