The average age of 30 students of a class is 14 years 4 months. After admission of 5 new student in the class the average becomes 13 years 9 months. The youngest one of the five new students is 9 years 11 months old. The average age of the remaining 4 new students is :

Options

A. 12 years 4 months/12 वर्ष 4 माह
B. 11 years 2 months/11 वर्ष 2 माह
C. 10 years 4 months/10 वर्ष 4 माह
D. 13 years 6 months/13 वर्ष 6 माह