In a $BCC$ lattice containing $X$ and $Y$ type of atoms, $X$ type of atoms are present at the corners and $Y$ type of atoms are present at the body center. In its unit cell, if three atoms are missing from the corners, the formula of the compound is:
- A$X_5 Y_8$
- B$X_8 Y_5$
- C$X_3 Y_5$
- D$X_5 Y_3$
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