Correct option is D
Given
Roman numerals: CXIX, XCIX, CXXI, CIX, CXX
Formula / Concept used
Convert Roman numerals into Hindu–Arabic numbers and arrange them in increasing order.
Solution
CXIX = 100 + 19 = 119 XCIX = 90 + 9 = 99 CXXI = 100 + 21 = 121 CIX = 100 + 9 = 109 CXX = 100 + 20 = 120
Increasing order of values: 99, 109, 119, 120, 121
Corresponding Roman numerals: XCIX, CIX, CXIX, CXX, CXXI
The correct option is (d)