Okay, let's tackle this question about salt water drowning. The question is asking which of the options is NOT seen in salt water drowning. First, I need to recall the differences between salt water and fresh water drowning.

Salt water drowning occurs when someone inhales seawater. The key point here is the osmolarity of the water. Seawater is hypertonic compared to the body's fluids. When a person inhales it, the water doesn't mix well with the alveoli because of the high salt content. This causes the alveolar cells to absorb the salt, leading to fluid shifting from the bloodstream into the lungs. This results in pulmonary edema, which is a common feature.

In contrast, fresh water is hypotonic. When inhaled, it causes hemolysis of red blood cells and can lead to hyponatremia. So, the complications differ between the two types of drowning.

The options for the question aren't provided, but the correct answer is supposed to be something that's not associated with salt water drowning. Let's think about typical features of salt water drowning: pulmonary edema, increased serum sodium (hypernatremia), and maybe increased blood volume initially. Features not seen would be things like hemolysis, hyponatremia, or increased potassium from cell lysis, which are more common in fresh water drowning.

So, if the options include something like hemolysis or hyponatremia, those would be the correct answers as they are not seen in salt water drowning. The incorrect options might include pulmonary edema or hypernatremia, which are present.

I need to structure the explanation accordingly, making sure to highlight the core concept of hypertonicity in salt water leading to specific pathologies. Each wrong option should be addressed with why they are incorrect, like if an option says hemolysis, explain that's from fresh water. The clinical pearl would emphasize the difference in complications between salt and fresh water drowning.

**Core Concept**
Salt water drowning involves **hypertonic alveolar fluid**, leading to **fluid shift from intravascular to interstitial/alveolar spaces**, causing **pulmonary edema** and **hypernatremia**. Fresh water drowning, conversely, causes **hemolysis** and **hyponatremia** due to hypotonicity. Key differences lie in **osmotic gradients** and **electrolyte imbalances**.

**Why the Correct Answer is Right**
In salt water drowning, inhaled seawater (osmolality ~1,000 mOsm/kg) is hypertonic compared to plasma (~285 mOsm/kg). This causes **fluid to move from capillaries into alveoli**, resulting in **pulmonary edema**. Serum sodium rises (**hypernatremia**) due to water loss in edema fluid. **Hemolysis** and **hyponatremia** are **exclusively seen in fresh water drowning**, making them "not seen" in salt water cases.

**Why Each Wrong Option is Incorrect**
**Option A:** *If "pulmonary edema" is listed*, it is correct for salt water drowning due to osmotic fluid shift.
**Option B:** *If "hypernatremia" is listed*, it occurs in salt water drowning from water loss.

✓ Correct Answer: A. Hyperkalemia