Which of the following medicines are the derivatives of malonyl
urea. (Barbituric acid)

Options

A. Antibiotics
B. Antiseptics
C. Analgesics
D. Tranquillizers

Answer

To determine which of the following medicines are derivatives of malonyl urea (barbituric acid), we can analyze the provided options step by step.

### Step 1: Understand Barbituric Acid
Barbituric acid is a compound derived from malonic acid and urea. It serves as the parent structure for a class of medications known as barbiturates, which are primarily used as tranquilizers and sedatives.

### Step 2: Identify the Options
We need to evaluate the given options to see which ones are related to barbituric acid. The options typically include:
1. Antibiotics
2. Antiseptics
3. Analgesics
4. Tranquilizers

### Step 3: Analyze Each Option
1. **Antibiotics**: These are compounds produced by living organisms that inhibit the growth of other microorganisms. Examples include penicillin. Barbituric acid is not related to antibiotics.

2. **Antiseptics**: These are substances that prevent the growth of disease-causing microorganisms. An example is Dettol. Barbituric acid does not fall under this category.

3. **Analgesics**: These are drugs used to relieve pain. Examples include morphine and aspirin. Barbituric acid is not classified as an analgesic.

4. **Tranquilizers**: These are drugs that reduce mental tension, relieve anxiety, and induce sleep. Barbituric acid and its derivatives, such as phenobarbital (Luminal) and equanil, are indeed tranquilizers.

### Step 4: Conclusion
Based on the analysis, the correct answer is that the derivatives of malonyl urea (barbituric acid) are **tranquilizers**.

### Final Answer
The medicines that are derivatives of malonyl urea (barbituric acid) are **tranquilizers**.

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