Which of the following set of variables give a straight line with a negative slope when plotted? (P= vapour pressure. T= Temperature in K)

Question

	y-axis	x-axis
(a) (b) (c) (d)	P $\log _{10}P$ $\log_{10}P \frac{1}{T}$ $\log _{10} P \log _{10}$	T T $\frac{1}{T}$ $\frac{1}{T}$