Sonal wanted to study the effect of various factors
on the rate of evaporation. For this, she carried out
the experiment under four different sets of conditions
as shown in the table.
Which two sets should she use to compare the effect
of temperature on the rate of evaporation?
ASet P and Set S
BSet Q and Set S
CSet Q and Set R
DSet P and Set R
I can't understand this question