"answer is due" is correct and usable in written English.
It is used to indicate something should be done by a certain date or time. For example, "The answer is due by Friday."
The answer is due to Yves de Cornulier (unpublished).
The leading answer is due to David Lewis, who is the proponent of the best-known version of possibilist realism, namely, modal counterpart theory.
The answer is due in part to a decrease in muscle movement and brain activity, especially during non-rapid eye movement (NREM) sleep, thus consuming less glucose.
If the 20th day after service falls on a Monday, the answer is due on the next Monday.
If you're an anxious person, note on your calendar when you sent the request, then go forward 6 weeks and put another note on your calendar reminding you that the answer was due, already!
It remains unknown, however, whether this disturbed answer to catecholamine response is due to a signaling problem at the receptor or postreceptor levels or due to the tissue's inability to produce the physiological answer, or both.
But some students claimed that the similarities in their answers were due to sharing notes or sitting in on sessions with the same teaching fellows.
The proportion of wrong answers is not significantly different between the genders implying that differences in correct answers are due directly to differences in abstaining behaviour.
The answer almost certainly is due to the lack of a conspicuous difference in density from surrounding breast parenchyma.
What do you command us to do when we encounter such a phenomenon?" He answered, "Give what is due from you and supplicate to Allah for your rights".
In general, the answer is no, due to concentration phenomena.
