Who wrote the book \(\textit{The Second Sex}?\)

| LIST-I | LIST-II | 
|---|---|
| A. Social Contract theory | I. Rawls | 
| B. Genesis of Caste theory | II. Berlin | 
| C. Theory of Justice | III. Locke | 
| D. Two Concepts of Liberty | IV. Ambedkar | 
| LIST-I (Book/Theory proposed/Characteristic, etc.) | LIST-II (Author/Thinker/Name of Theory, etc.) | 
|---|---|
| A. The Second Sex | I. L. Irigaray | 
| B. The History of Sexuality | II. S. Firestone | 
| C. The Ethics of Sexual Differences | III. S. De Beauvoir | 
| D. The Dialectic of Sex | IV. M. Foucault | 
What comes next in the series? 
\(2, 6, 12, 20, 30, \ ?\)