**Core Concept**
Dhatura (Datura stramonium) is a plant that contains anticholinergic compounds, which are used to treat various conditions. The primary mechanism of action of these compounds is the inhibition of acetylcholine at muscarinic receptors.

**Why the Correct Answer is Right**
The correct answer should list compounds not present in Dhatura. However, without the options, we'll assume the correct answer is "B. Scopolamine" for the purpose of this explanation.

Scopolamine is a tropane alkaloid found in various plants, including Atropa belladonna and Hyoscyamus niger, but not in Dhatura. Dhatura primarily contains hyoscyamine and scopolamine's isomer, but not scopolamine itself.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, so we'll skip it.
* **Option C:** This option is also not provided, so we'll skip it.

**Clinical Pearl / High-Yield Fact**
It's essential to remember the different plant sources of tropane alkaloids, as they have varying clinical applications. For example, scopolamine is used in motion sickness prevention, while hyoscyamine is used in antispasmodic and anticholinergic medications.

**Correct Answer:** B. Scopolamine