In this question, we are looking at a graph that depicts the variation in temperature from 0°C to 100°C over time for two different liquids, P and Q.

Option 1 suggests that liquid P was hotter than liquid Q the entire time. This would imply that on the graph, liquid P`s line would always be above liquid Q`s.

Option 2 suggests that at no point did the two liquids have the same temperature. If this were true, the lines for P and Q on the graph would never intersect.

Option 3 claims that liquid P got to the temperature of 100°C faster than did Q. For this to be true, liquid P`s line on the graph would have to reach the 100°C mark before liquid Q`s did.

Finally, option 4, which is the correct answer, proposes that liquid Q reached 100°C faster than liquid P. This signifies that on the graph, the line representing liquid Q gets to the 100°C mark before the line for liquid P does.