It was she who came running into the classroom.
She is acting as subject in this sentence.
We use that to refer back to something that has already been spoken or written about: If he gets that job in London, he'll be able to visit us more often.
Who is used for human beings.
"Themselves" is the correct reflexive pronoun for "scientists," which is plural.
Themselves means خود کو
"Who" introduces the clause "who was going to market" and relates it to "Hyder".
This makes "who" a relative pronoun.
Each Other: دو لوگوں کیلئے استعمال ہوتا ہے
One Another: دو سے زائد لوگوں کیلئے استعمال ہوتا ہے
Neither of them will not refute the charges.
Both is not used in negative sentences.
The underlined word "which" in the sentence "Which is your pen?" is an interrogative pronoun.
Interrogative pronouns are used to ask questions.
They include words like "who," "whom," "whose," "which," and "what."
Any is used for more than two while either is used for two.
A Relative pronoun is a pronoun that marks a relative clause.
Who is a Relative pronoun here because here who is not used for asking question.