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Answer the question based on the following information.

These questions are based on the price fluctuations of four commodities — arhar, pepper, sugar and gold during February-July $1999$ as described in the figures below.

The price volatility(PV) of the commodity with the highest PV during the February-July period is approximately equal to

1. $3\%$
2. $40\%$
3. $20\%$
4. $12\%$