A) W and X are liquid layers.
B) Surface of Y is called crust.
C) Layer Z makes up most of the total Earth's volume.
D) All of these
Correct Answer: B
Solution :
W is inner core, X is outer core, Y is mantle and Z is crust. Surface of Y is called crust. W is a solid layer whereas X is a liquid layer. Layer Y makes up most of the total Earth's volume.
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