A young lady talking rifampicin and OCP together become pregnant, most

1.	A young lady talking rifampicin and OCP together become pregnant, most probable cause is____________?
A.	Rifampicin causes hepatic enzyme induction and increase metabolism of OCP’s
B.	Decreased absorption of OCP’s
C.	Obstruction of fallopian tubes
D.	Increase excretion of OCP’s
Answer» B. Decreased absorption of OCP’s

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