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: Dental
Which of the following cements is most irritant to pulpal tissues? 
Select and explain. 
A. Zinc phosphate, B. Silicate, C. Glass ionomer, D. Polycarboxylate
B: Silicate
Answer: B: Silicate 
Explanation: Because of its high acidity, silicates were classifed as severe irritant. High acidity can irritate and sometimes lead to irreversible pulpal damage.
Ref: Mannapalli ed 3 pg 48