Explanation

Punctuation is a series of symbols and marks that make written language easier to read.

We use punctuation marks to denote pauses, separate elements of sentences, or add emphasis to parts of our writing.

Explanation

Either or takes verb from second subject (he) 

We use is with he or she. 

Either you or he is at fault یا تو آپ یا وہ غلطی پر ہیں

Explanation

Is this the bus, which goes to the Sadar Bazar?

"Which" is the correct relative pronoun to use in this context.

Explanation

Either Sana or her friends were present there.

This is because "either...or" structures take the verb form that agrees with the subject closer to the verb.

It in this case is "friends" (plural), hence "were" is correct.

Explanation

In the test, we will assess your work and then provide you with detailed feedback.

This word specifically denotes the act of evaluating or appraising something systematically.