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 is false regarding ethyl silicate bonded investment? 
Select and explain. 
A. Silica gel which reverts to silica on heating, B. Magnesium oxide provides strength, C. It is easy to handle and most commonly used, D. On mixing ammonium chloride silica liquid coverts to gel
C: It is easy to handle and most commonly used
Answer: C: It is easy to handle and most commonly used 
Explanation: ESBI is difficult to handle and not used more commonly