The compound called microscomic salt is:

Options

A. `Na_(2)HPO_(4)*2H_(2)O`
B. `Na(NH_(4))HPO_(4)*4H_(2)O`
C. `Na_(1)NH_(4)PO_(4)*2H_(2)O`
D. `(NH_(4))_(2)HPO_(4)*2H_(2)O`

Answer

To solve the question regarding the compound known as microsomic salt, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the identity of the compound known as microsomic salt.

2. **Identify the Options**: Although the options are not provided in the question, we can infer that we need to determine which compound is referred to as microsomic salt from a list of compounds.

3. **Recall the Composition of Microcosmic Salt**: Microcosmic salt is a compound that consists of sodium ions (Na⁺), ammonium ions (NH₄⁺), and a phosphate group (PO₄³⁻). It is often represented as NaNH₄HPO₄·4H₂O.

4. **Relate to its Occurrence**: Microcosmic salt is known to be found in urine and is also referred to as stercorite when in its mineral form. This information is crucial for identifying the correct option.

5. **Select the Correct Option**: Based on the information provided, the correct answer to the question is the compound that matches the description of microcosmic salt, which is typically represented as NaNH₄HPO₄·4H₂O.

### Final Answer:
The compound called microsomic salt is **NaNH₄HPO₄·4H₂O**.