A bill of exchange is a negotiable instrument that specifies a payment to be made at a future date.
When a bill is drawn ‘payable one month after date’, you add one month to the date it was drawn — in this case, 1st July, 2021.
So, adding one month gives you 1st August, 2021.
However, under the Negotiable Instruments Act, three days of grace are added to the due date to arrive at the final maturity date.
Therefore, 1st August + 3 days = 4th August, 2021.
So, the maturity date of this bill of exchange will be 4th August, 2021.
Other options like 3rd August or 5th August do not match the correct grace period calculation.
Therefore, the correct answer is option (A) 4th August, 2021.