- AThursday, 29 November
- BSaturday, 30 November
- CFriday, 30 November
- DSaturday, 1 December
Step-by-Step Solution
Day 21 is 20 days after day 1: 10 + 20 = 30 November. 20 = 2 weeks + 6 days, so Saturday + 6 = Friday. (Saturday, 1 December adds 21 days.)
Answer: C) Friday, 30 November