The correct answer is: D. as if
The word “as if” is used to express a condition that is not actually true. In this case, Jayant is not actually an experienced person, but he plays football as if he were. This could mean that he is very good at football, or that he simply acts like he is an experienced player.
The other options are not as accurate. The word “as” is used to compare two things, but in this case, Jayant is not being compared to anyone. The word “as though” is also used to compare two things, but it suggests that the comparison is more hypothetical than actual. The word “as of” is used to indicate a point in time, but it does not make sense to say that Jayant plays football as of an experienced person.
In conclusion, the correct answer is “as if” because it is the only option that accurately expresses the meaning of the sentence.