Explanation:

Definition of the words:
- Implicit: implied or understood though not directly expressed.
- Obnoxious: extremely unpleasant or offensive.
- Explicit: stated clearly and in detail, leaving no room for confusion or doubt.
- Pedantic: excessively concerned with minor details and rules or with displaying academic learning.

Understanding the options:
- Implicit: This option implies that the correct answer is indirectly expressed.
- Obnoxious: This option suggests that the correct answer is extremely unpleasant or offensive.
- Explicit: This option states that the correct answer is clearly and directly expressed.
- Pedantic: This option indicates that the correct answer is overly concerned with minor details and rules.

Reasoning:
To determine the correct answer, we need to consider the meaning of the given word, "obscure."

Meaning of "obscure":
- Obscure: not discovered or known about; uncertain.

Analysis of the options:
- Implicit: This option implies that the correct answer is indirectly expressed. However, the word "obscure" is not usually associated with indirect expressions. Therefore, this option does not align with the meaning of "obscure."
- Obnoxious: This option suggests that the correct answer is extremely unpleasant or offensive. While the word "obscure" can sometimes be used to describe something unpleasant, it does not necessarily imply offensiveness. Therefore, this option does not accurately describe the word "obscure."
- Explicit: This option states that the correct answer is clearly and directly expressed. This aligns with the meaning of "obscure" as something not uncertain or unknown. Therefore, this option accurately describes the word "obscure."
- Pedantic: This option indicates that the correct answer is overly concerned with minor details and rules. While this may sometimes apply to the word "obscure" in a certain context, it is not the most suitable description for the general meaning of "obscure." Therefore, this option does not accurately describe the word "obscure."

Conclusion:
Based on the analysis, the correct answer is option 'C' - Explicit. This option aligns with the meaning of "obscure" as something clearly and directly expressed, leaving no room for uncertainty.