The correct choice is (a) Take-off → climb → cruise → descent → landing
The best explanation: The stages of mission profile of a commercial aircraft are Take-off → climb → cruise → descent → landing. An aircraft firstly take-off from ground at the initial airport. At an altitude of 50 foot it starts climbing to higher altitudes, next it starts to cruise to some designated distance and later it starts descending to lower altitude. Finally at an altitude of 50 foot above the ground the aircraft starts landing in the destination airport.