Which of the following works have NOT been authored by John Stuart Mill?
A) Subjection of Women
B) Thoughts on Parliamentary Reform
C) Past and Present
D) Explorations
E) On Liberty
Choose the correct answer from the options given below:

The correct answer is C and D only.

To determine which of the works listed were NOT written by the famous English philosopher and political economist John Stuart Mill (J.S. Mill), we can examine the authorship of each text:
1. A) Subjection of Women: This essay was written by John Stuart Mill in 1869, arguing in favor of gender equality and women's right to vote.
2. B) Thoughts on Parliamentary Reform: This pamphlet was authored by John Stuart Mill in 1859, expressing his views on electoral systems and voting representation.
3. C) Past and Present: This influential book, published in 1843, was written by the Scottish essayist, historian, and philosopher Thomas Carlyle, not J.S. Mill.
4. D) Explorations: This collection of essays and lectures was written by the Irish poet and dramatist William Butler Yeats (W.B. Yeats) and published posthumously, not J.S. Mill.
5. E) On Liberty: This is one of J.S. Mill's most famous philosophical works, published in 1859, which discusses the relationship between authority and liberty.

Therefore, the works C (Past and Present) and D (Explorations) were NOT authored by John Stuart Mill, making "C and D only" the correct choice.