This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Histo Pathology, Subject name: Pathology
Substance commonly used for organ/tissue preservation for histopathological examination is? 
Select and explain. 
A. Ethyl alcohol, B. Formalin, C. Saturated salt solution, D. Normal saline
B: Formalin
Answer: B: Formalin 
Explanation: ANSWER: (B) FormalinREF: Parikh 6th edition page 2.62Repeat in December 2009"10% formalin is used as a preservative for tissue meant for histopathological examination"