Why do teachers only use red pens? Know – India TV Hindi.

Why do teachers only use red pens?  Know - India TV Hindi.
Seeing the red pen ink on the answer sheets of the students must have raised the question in your mind ...
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Have you seen the pen of crores? Check out the 10 most expensive pens in the world here

Have you seen the pen of crores?  Check out the 10 most expensive pens in the world here
Have you seen the pen of crores? Check out the 10 most expensive pens in the world here Image Source: ...
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