**Core Concept**
Suicidal drowning and homicidal drowning are two distinct forms of drowning, with different underlying mechanisms and characteristics. Suicidal drowning typically involves a voluntary act of submersion, often with a history of mental health issues or other personal factors. In contrast, homicidal drowning is a form of homicide where the victim is intentionally submerged in water by an assailant.

**Why the Correct Answer is Right**
Suicidal drowning is characterized by the presence of a "lacrimal" or "pleural" fluid in the lungs, indicating that the person was alive at the time of submersion. This is due to the presence of surfactant in the alveoli, which prevents the lungs from collapsing during submersion. In homicidal drowning, the lungs are typically dry, as the victim was likely killed before submersion. The lack of surfactant and the absence of lacrimal fluid in the lungs are key distinguishing features between suicidal and homicidal drowning.

**Why Each Wrong Option is Incorrect**
**Option A:** The presence of a "lacrimal" or "pleural" fluid in the lungs is indeed a characteristic of suicidal drowning, not homicidal drowning.
**Option B:** The location of the body in relation to the water's surface is not a reliable indicator of suicidal versus homicidal drowning, as the body can be positioned in various ways depending on the circumstances.
**Option C:** The presence of water in the stomach is not a distinguishing feature between suicidal and homicidal drowning, as water can enter the stomach in both cases.

**Clinical Pearl / High-Yield Fact**
In forensic pathology, the presence of surfactant in the lungs and the absence of lacrimal fluid can be used to distinguish between suicidal and homicidal drowning.

**Correct Answer: A. The presence of a "lacrimal" or "pleural" fluid in the lungs is indeed a characteristic of suicidal drowning, not homicidal drowning.