**Core Concept**
Objective research refers to the systematic and unbiased collection of data through experiments, surveys, or observations to draw conclusions about a hypothesis or research question. It aims to minimize personal biases and ensure the reliability and validity of the results.

**Why the Correct Answer is Right**
The correct answer will be a type of research that does not fit the definition of objective research. Since the options are missing, I will provide a general explanation. Objective research excludes research that is subjective, biased, or influenced by personal opinions. For example, case reports, expert opinions, or anecdotal evidence are not considered objective research.

**Why Each Wrong Option is Incorrect**
Since the options are missing, I will provide a general explanation.

**Option A:** This option might be a type of research that is considered objective, such as a randomized controlled trial (RCT). In this case, the statement would be incorrect because RCTs are indeed a form of objective research.

**Option B:** This option might be a type of research that is considered objective, such as a meta-analysis. In this case, the statement would be incorrect because meta-analyses are a systematic review of existing literature, which can be considered objective.

**Option C:** This option might be a type of research that is considered subjective, such as a case series or a qualitative study. In this case, the statement would be correct because these types of research are not considered objective.

**Option D:** This option might be a type of research that is considered objective, such as a prospective cohort study. In this case, the statement would be incorrect because prospective cohort studies are indeed a form of objective research.

**Clinical Pearl / High-Yield Fact**
Remember that objective research aims to minimize personal biases, which is essential in scientific inquiry to ensure the reliability and validity of the results.

**Correct Answer:** C.