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1.2 \overset{°}{A} থেকে 6 \overset{°}{A}

1.5 \overset{°}{A} থেকে 6 \overset{°}{A}

3 \times 10^{- 10} \overset{°}{A} থেকে 5 \times 10 -^{10} \overset{°}{A}

2.0 \times 10^{- 10} \overset{°}{A} থেকে 5 \times 10 -^{10} \overset{°}{A}

ANS : 4

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