## ordinary differential equation

Given the ordinary differential equation
dP/dt = P/H - k * Q/H
units of
k is (J/sec)/C, units of H is J/C, units of Q is C and is
temperature rise after
t seconds, units of P is J/sec then
the units common to each term
(a) differ as defined by the constants
k and H

(b) are given by [
C/sec]
(c) are given by [W/sec]
(d) are given by [J/sec]

(e) none of the above
I am not really sure of the correct answer? I was thinking it could be (a)?