Final answer:
The incorrect statement about pickups from the Marine Air and Delta Shuttle group ride stand at LGA Airport is that passenger pickups are not allowed at LGA Airport. It is untrue as there are designated pickup areas, and airports are typically open for pickups 24/7, albeit with certain regulations or restrictions.
Step-by-step explanation:
The question pertains to the pickup policies at LaGuardia Airport (LGA) for passengers using the Marine Air and Delta Shuttle. Specifically, it's asking which statement is NOT true about passenger pickups.
The incorrect statement among the options provided is (d) 'Passenger pickups are not allowed at LGA Airport.' It is false because there are indeed designated pickup stands at LGA for various services, including ones for Marine Air and Delta Shuttle. For the other options, (a) Passengers can usually be picked up at any time as airports operate on a 24/7 basis; (b) There is a designated pickup stand for Marine Air and Delta Shuttle group rides; (c) There may be specific regulations or restrictions for pickups at the stand, which is common at most airports to ensure safety and order.