This pen . . . . . . . . me Rs. 10.

Solution (By Examveda Team)

The correct answer is Option B: costs.
Here's why:

* This question tests your understanding of simple present tense, which is used for habitual actions or facts that are generally true.

* The statement "This pen . . . . . . . . me Rs. 10" describes a general price or the value of the pen.

* The verb "cost" is irregular in the past tense; its past form is also "cost," not "costed."

Let's look at why the other options are incorrect:

* Option A: costed - "Costed" is not a correct verb form in standard English. The past tense of "cost" is "cost."

* Option C: cost - While "cost" is the past tense of the verb, using "cost" here implies the pen *used to* cost Rs. 10 in the past. However, we need a simple present to indicate the current price of the pen, and we need it to agree in number with the subject "pen." Because "pen" is singular we need the 3rd person singular verb form "costs."

* Option D: will cost - "Will cost" implies a future price. It suggests that the price of the pen will be Rs. 10 in the future, but that is not the context. Therefore, it's not the best fit.