Please give me an answer to the question in the photo

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Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

State the following: boyle's law and charle's law