Answer : 1. "Oleg Kononenko"
Explanation :

Recently, Russian astronaut Oleg Kononenko set a world record for the most time spent in space and broke the record of his fellow Russian astronaut Gennady Padalka. Kononenko is 59 years old and has spent 878 days and more than 12 hours in space. Padalka's record was 878 days, 11 hours, 29 minutes and 48 seconds, set during five space missions through 2017. Kononenko works out regularly to combat the physical effects of weightlessness. He has said that he does not feel deprived or isolated, but when he returns to Earth he realizes how much life he missed.