Question
| ‘A’ | ‘B’ |
| $(1)$ Unprecedented space tragedy $(2)$ Certified flight instructor $(3)$ Space mission $(4)$ Super - specialisation |
$(A)$ A person with the correct qualification to teach people to fly planes $(B)$ A set of jobs to be done in space by a group $(C)$ Great expertise in a limited field or a particular subject $(D)$ A sad accident of a kind that has never happened before in space |