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: Unknown
Which of the following drugs for moderate-to-severe psoriasis inhibits both IL-12 and IL23? 
Select and explain. 
A. Alefacept, B. Efalizumab, C. Ustekinumab, D. Abatacept
C: Ustekinumab
Answer: C: Ustekinumab 
Explanation: Alefacept is anti CD-2 for psoriasis
Efalizumab is anti CD-11a for psoriasis
Ustekinumab targets the p40 subunit of both IL-12 and IL-23 in psoriasis
Abatacept is anti CD-80 and CD-86 for severe RA