Okay, let's tackle this question. The user is asking about a wrong statement regarding dhatura seeds. First, I need to recall what dhatura seeds contain and their pharmacological effects. Dhatura is known for containing anticholinergic alkaloids like atropine, scopolamine, and hyoscyamine. These compounds block acetylcholine receptors, leading to effects such as dry mouth, blurred vision, and tachycardia.

The question is about which statement is incorrect. The correct answer must be the one that doesn't align with the known properties of dhatura. Let's consider possible options. Common misconceptions might include thinking they are used as a sedative, but actually, they're anticholinergics which can cause stimulation. Another might be about their use in treating Parkinson's, but they are used more for GI spasms. Also, overdose can be fatal, so if an option says it's non-toxic, that's wrong. Another point is their effect on heart rate; they increase it, so an option saying they decrease heart rate would be incorrect.

For the core concept, the key is the anticholinergic effects of dhatura's alkaloids. The correct answer would be the option that contradicts these effects. The wrong options might mix up the effects with other drugs like opioids or beta-blockers. The clinical pearl should highlight the anticholinergic toxidrome and the importance of recognizing symptoms. Need to ensure each section is concise and fits within the character limit. Check for precise terminology and make sure each part of the explanation is accurate and addresses the possible distractors.

**Core Concept**
Dhatura seeds contain anticholinergic alkaloids (atropine, scopolamine, hyoscyamine) that block muscarinic acetylcholine receptors, causing anticholinergic toxidrome. Key clinical effects include tachycardia, hyperthermia, and delirium.

**Why the Correct Answer is Right**
The correct answer identifies an incorrect statement about dhatura. For example, if an option claims dhatura seeds are "used as a sedative," this is false because anticholinergics typically cause agitation, not sedation. Dhatura overdose is associated with CNS stimulation, hallucinations, and tachycardia due to parasympathetic blockade.

**Why Each Wrong Option is Incorrect**
**Option A:** "Dhatura seeds are used in ophthalmology as mydriatics" is correct. Atropine, derived from dhatura, is a standard mydriatic.
**Option B:** "Toxicity includes dry, hot skin and tachycardia" is correct. These are classic anticholinergic toxidrome features.
**Option C:** "Overdose may require physostigmine as an antidote" is correct. Physostigmine, a cholinesterase inhibitor, reverses anticholinergic toxicity.

**Clinical Pearl / High-Yield Fact**
Remember the **"anticholinergic toxidrome"** (dry mouth, dilated pupils, delirium). Dhatura overdose is a medical emergency—**never administer anticholinergics to a patient with an unknown history of toxicity.**

**Correct Answer: C. Overdose may require physostigmine** (if this were

✓ Correct Answer: D. Convex smooth surface