A was a scientist beyond extraordinary. Well after all winning noble prize twice is not a joke !!! A is also amongst few lucky people who had a chance of sharing the noble with his/her spouse.
B was also a scientist beyond extraordinary .Regarding B it is said that after he made a particular discovery ,he was so sure of getting the Noble prize that he booked tickets for the awards night even before the recipient’s name was declared.
Now A and B share one more common aspect other than the fact that they are both extraordinary physicists; it is their birthday(not the same year though).
C is also a very extraordinary physicist. After all even he managed to win the coveted noble in the fields of astrophysics.
Now B and C also share something in common and that is blood!!!!After all B is the paternal uncle of C.
Hint: For all science students in India the name B is very common as the name is associated with the national science day.