Ques : Which of these is the only pair of identical twins to have travelled to space, who were also part of NASA’s Twins Study programme?

NASA

Ques : Which of these is the only pair of identical twins to have travelled to space, who were also part of NASA’s Twins Study programme?

A. Andrew and Jospeh Allen

B. Dale and Guy Gardner

C. Scott and Mark Kelly

D. Yury and Roman Romanenko