The correct answer is option 3.

A. John C. Mather - He is a physicist, cosmologist and a Nobel Prize laureate in Physics in 2006 for his work on the Cosmic Background Explorer Satellite (COBE) with George Smoot. This makes `4. Nobel Prize Winner, 2006 in Physics` the correct match.

B. Michael Griffin - He is an American physicist and aerospace engineer who served as Administrator of NASA from 2005 to 2009. So, `3. Administrator of NASA` is the right match.

C. Paul G. Allen - He was an American business magnate, software engineer, and philanthropist. Alongside Bill Gates, Allen co-founded Microsoft. This is why `1. Co-founder of Microsoft` is the suitable choice.

D. Piers Sellers - Sellers was a British-American meteorologist, astronaut, and NASA official who even carried out several spacewalks during his career making `2. Space Walker` the right match for him.

So, the correct matching is option 3: A-4, B-3, C-1, D-2.