B .There are 24 days remaining in July (31 - 7 ); 31 days in August; 30 days in September; and 5 days in October (24 + 31 + 30 + 5 = 90 days).
The days are not only based on estimation but on Accurate number of days in each month. Since it is written in july 7 then its maturity will be on october 5