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ALL OF THE ABOVE IS THE CORRECT ANSWER.
When you rub balloon with hair , electron are transferred from hair to balloon & charges develop due to rubbing or friction.
Both developed charges because balloon get negatively charged and hair get positively charged.
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Correct option is b) Electrons are transferred from hair to baloon.
This is because, rubbing the balloon onto your hair or onto the wool fabric adds electrons to the balloon and causes the balloon to become negatively charged. Like charges repel (the two balloons, once charged, will move away from each other) and opposite charges attract (the paper will be attracted to the charged balloons.)
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