From the table along the rows,
7 - 4 = 3
1 - 5 = -4
Difference between the first number and second number along the rows is equal to the third number.
Let the missing number = a
Similarly along the second row,
4 - 10 = a
$$\Rightarrow$$Â a = -6
$$\therefore\ $$The missing number = -6
Hence, the correct answer is Option A
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