What is the correlation between marks of history and mathematics?
A) Positive Correlation
B) Negative Correlation
C) Imperfect
D) No relation

Hint: In this question, we have been asked the correlation between marks of history and mathematics. Find out if there is anything common between the two subjects and then decide the relation between them by choosing the correct or the nearest option.

Complete step by step solution:
We have been asked the correlation between marks of history and mathematics. First let us know about the given types of correlation.
Option A) Positive Correlation: If there is a positive correlation between two variables, it means that both the variables are moving in the same direction. If one increases, the other also increases and if one decreases, the other also decreases.
In this question, there is no such rule or logic which says that if the marks of history increase or decrease, the same would happen with the marks of mathematics. Therefore, this option is not the right answer.
Option B) Negative Correlation: If there is a negative correlation between two variables, it means that both the variables are moving in the opposite direction. If one increases, the other decreases and if one decreases, the other increases.
In this question, there is no such rule or logic which says that if the marks of history increase or decrease, the opposite would happen with the marks of mathematics. Therefore, this option is not the right answer.
Option C) Imperfect correlation: In this type of correlation, the variables change at different ratios. In this case, both the variables might be increasing or decreasing, but one might be slower or faster than the other.
As already discussed above, the variables have neither positive nor negative correlation with each other. So, they cannot be imperfectly correlated.
Option D) No relation: it basically means that both the variables act individually and have nothing to do with each other.
As we know that the chapters of history are entirely different from the chapters of mathematics. Hence, they have got nothing to do with each other and they have no relation.
Therefore, this option is the correct answer.

Option D is the correct answer.

Note: We have to know that the trial and error approach is used most successfully with simple problems and in games, and it is often the last resort when no apparent rule applies. This does not mean that the approach is inherently careless, for an individual can be methodical in manipulating the variables in an attempt to sort through possibilities that could result in success. Nevertheless, this method has been studied from its natural computation point of view.