<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: Anti U1 RNP is a feature of:
Options:
A. SLE
B. MCTD
C. Sclerorema
D. CREST
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is B: MCTD. Explanation: MCTD<|im_end|>
