This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Hormones which act on intracellular receptors both initially in the cytoplasm and ultimately on nuclear receptors are categorized under: 
Select and explain. 
A. Group I hormones, B. Group II hormones, C. Group III hormones, D. Group IV hormones
A: Group I hormones
Answer: A: Group I hormones 
Explanation: None