What is the relationship between current and voltage across

What is the relationship between current and voltage across the resistor in a
            series RC circuit? (Some might consider this a trick question. Think carefully
            about your answer.)
            (A) Current leads voltage by 90^o.
            (B) Current lags voltage by 90^o
            (C) Voltage leads current by 45^o
            (D) Voltage lags current by 45^o
            (E) Current and voltage are in phase.

Solution

D..voltage lags current By 45⁰