Which of the following is NOT a category of Old Testament writing?

A. History
B. Law
C. Psalms
D. Wisdom Literature
E. Prophecy

I think it's Psalms.

Most would classify Psalms as a part of Wisdom literature, so you are correct.

But was Psalms part of the Old or New Testament?

Psalms are in the Old Testament.

You are correct. Psalms is not a category of Old Testament writing. To determine the correct answer, we need to understand the different categories of Old Testament writing:

A. History: This category includes books like Genesis, Exodus, and Samuel, which recount the historical events of the Israelites.

B. Law: This category includes books like Exodus, Leviticus, Numbers, and Deuteronomy, which contain the laws and commandments given to the Israelites by God.

C. Psalms: Psalms is actually a book within the Old Testament. It is not a category itself but rather a collection of poetic prayers, praises, and expressions of trust in God.

D. Wisdom Literature: This category includes books like Proverbs and Ecclesiastes, which provide practical guidance and insights on life, morality, and the fear of God.

E. Prophecy: This category includes books like Isaiah, Jeremiah, and Ezekiel, which contain messages of warning, judgment, and hope from God's prophets.

Therefore, the correct answer is C. Psalms, as it is not a category but rather a book within the Old Testament.