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: Surgery
Carcinoma thyroid with blood-borne metastasis is- 
Select and explain. 
A. Follicular, B. Papillary, C. Mixed, D. Medullary
A: Follicular
Answer: A: Follicular 
Explanation: As already explained above

Papillary spreads mainly by → lymphatics
Follicular spreads mainly by → hematogenous
Anaplastic spreads mainly by → direct (lymphatic and blood-borne spread is also seen)
Medullary spreads mainly by → lymphatics

Also Remember

"The most common sites of blood-borne metastasis are lung, bones and brain. Lung involvement is more frequent in papillary carcinoma, while bone involvement is more common in follicular thyroid Ca."

Endocrine surgery of head & neck by Phillip K. Pellitteri & Thomas V. McCaffrey