What type of drugs are artificially prepared in pharmaceutical laboratories?

Question

A. Scheduled drugs
B. Controlled substances
C. Synthetic drugs
D. Mineral-Based steriods

im thinking D what do you guys think?

Answer 1

All are prepared in laboratories, but only one is artificial. Which word in which possible answer means "artificial"?

Answer 2

so then it would be C?

Answer 3

Right

Answer 4

thanks