Question id 152 - Principles of Flight - ATPL - Airline Transport Pilot license

Deploying a Krueger flap will form a slot, deploying a slat does not
Deploying a slat will form a slot, deploying a Krueger flap does not
Deploying a Krueger flap will increase critical angle of attack, deploying a slat does not
Deploying a slat will increase critical angle of attack, deploying a Krueger flap does not