Final answer:
The drugs synthesized during World War II due to a lack of natural resources were Chloroquine and mefloquine, which are anti-malarial medications. These were developed in response to the Allies losing access to quinine, and they belong to the class of 4-aminoquinolines.
Step-by-step explanation:
During World War II, chemists synthesized drugs due to the unavailability of certain parks which contained natural remedies. The correct answer to the question is Chloroquine and mefloquine, which were synthesized after access to quinine was cut off to Allied forces. Both Chloroquine and Amodiaquine are representatives of the 4-aminoquinolines class of drugs that arose from WWII efforts, and these drugs are still in use today despite the development of resistance.
Penicillin was also instrumental during WWII; however, it was a product of mold and was mass-produced rather than synthesized from chemical efforts. Streptomycin, another antibiotic, is a product of microbial synthesis and does not fit the context of the question as it was not a result of WWII synthetic efforts. As such, options A, B, and D are incorrect.