1.

\left. \begin{array} { l } { ( 1 ) 2 \times 10 ^ { - 4 } } \\ { ( 2 ) 10 ^ { - 8 } } \\ { 2 \times 10 ^ { - 11 } } \\ { ( 4 ) 2 \times 10 ^ { - 12 } } \end{array} \right.

Answer»

option (a) is correct

The ans is option (c)



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