Assertion.CsCl has body-centred cubic arrangement
Reason.CsCl has one `Cs^+` ion and 8 `Cl^-` ions in its unit cell.
A. If both assertion and reason are true, and reason is the true explanation of the assertion.
B. If both assertion and reason are true, but reason is not the true explanation of the assertion.
C. If assertion is true , but reason is false
D. If both assertion and reason are false.