Q: The ratio of the ages of Esha and her mother is 1 : 4 and the ratio of the ages of Esha's mother and her brother is 9 : 1. If Esha's brother is 5 years younger than Esha. What will be the age of Esha's mother after 4 years?

• A. 36 years
• B. 40 years
• C. 45 years
• D. 50 years
• E. None of these