A lift is coming from 8^{th} floor and is just about to reach 4^{th} floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the following is correct?

(a) x < 0, v < 0, a > 0

(b) x > 0, v < 0, a < 0

(c) x > 0, v < 0, a > 0

(d) x > 0, v > 0, a < 0