A concrete structure is set on fire and the temperature raises to 1000¬∞C. The strength of concrete as compared to original strength reduces to

A concrete structure is set on fire and the temperature raises to 1000

1.	A concrete structure is set on fire and the temperature raises to 1000¬∞C. The strength of concrete as compared to original strength reduces to
A.	none of these.
B.	0.1
C.	0.15
D.	0.2
Answer» D. 0.2