The correct option is B Negative
The product −437×562 can be written as −(437×562).
Now, as both the numbers 437 and 562 are positive, the sign to the product (437×562) is also positive.
And, to find the sign of the product −(437×562), we attach a negative sign to the postive value of the product (437×562).
Hence, the sign of −437×562=−(437×562) is negative, i.e., option (b.) is the correct one.