Which of the following numbers will replace the question mark (?) in the given series?
141, 132, ?, 114, 105

Correct option is A

​$$\text{Given series: } 141, 132, ?, 114, 105 \\[6pt]\text{Assume the difference between consecutive terms is constant and equals } -9. \\[6pt]\text{Check the differences:} \\141 - 9 = 132 \\[6pt]132 - 9 = 123 \\[6pt]123 - 9 = 114 \\[6pt]114 - 9 = 105 \\[6pt]\text{Thus, the missing number is } 123. \\[6pt]\text{Therefore, the correct answer is } \boxed{123}.$$​​