Final answer:
An informal review may consist of a casual meeting, desk check, inspection, and pair programming.
Step-by-step explanation:
An informal review may consist of the following:
- Casual meeting
- Desk check
- Inspection
- Pair programming
- a and b
An informal review is a less structured and more relaxed way of evaluating something. It can include casual meetings where feedback is given, desk checks where someone reviews a document or code, inspections of a physical object or system, and pair programming where two programmers work together to review and improve code. An informal review can include both a casual meeting and a desk check, hence the correct option is a and b.