Which of the following statements is not true for cocaine ?

Options

A. It is commonly called coke or crack and is usually snorted.
B. It is obtained from coca plant Erythroxylum coca.
C. It has potent suppressing action on central nervous system.
D. It interferes with the transport of dopamine neurotransmitter.

Answer

To determine which statement is not true for cocaine, let's analyze each option step by step.

### Step 1: Analyze the first statement
**Statement:** "It is commonly called coke or crack and it is usually snorted."
- **Analysis:** Cocaine is indeed commonly referred to as "coke" or "crack." Additionally, it is often consumed by snorting.
- **Conclusion:** This statement is true.

### Step 2: Analyze the second statement
**Statement:** "It is obtained from cocoa plant, erythroxylum cocoa."
- **Analysis:** Cocaine is derived from the leaves of the Erythroxylum coca plant, not the cocoa plant (Theobroma cacao, which is used for chocolate). However, the question refers to the correct plant name, Erythroxylum coca.
- **Conclusion:** This statement is true.

### Step 3: Analyze the third statement
**Statement:** "It has potent suppressing action on central nervous system."
- **Analysis:** Cocaine is a stimulant that activates the central nervous system (CNS). It does not suppress CNS activity; rather, it enhances it.
- **Conclusion:** This statement is not true.

### Step 4: Analyze the fourth statement
**Statement:** "It interferes with the transport of dopamine neurotransmitter."
- **Analysis:** Cocaine blocks the reuptake of dopamine, leading to increased levels of dopamine in the synaptic cleft, which is consistent with its stimulant properties.
- **Conclusion:** This statement is true.

### Final Conclusion
Based on the analysis, the statement that is not true for cocaine is:
**"It has potent suppressing action on central nervous system."**