**Core Concept**
Mercury poisoning is a well-documented cause of neurological damage, leading to various symptoms including tremors, personality changes, and cognitive decline. The exact mechanism of mercury toxicity involves the disruption of enzyme function and the formation of free radicals, ultimately leading to neuronal damage.

**Why the Correct Answer is Right**
Mercury is a potent neurotoxin that can cause a range of neurological symptoms, including tremors, known as "shaking palsy." This is due to its ability to bind to sulfhydryl groups in enzymes, leading to their inactivation and disruption of normal cellular function. Mercury can also cause the formation of free radicals, which can damage neuronal membranes and contribute to the development of neurodegenerative diseases.

**Why Each Wrong Option is Incorrect**
**Option A:** Lead poisoning is associated with a range of neurological symptoms, including cognitive impairment and developmental delays, but it is not typically associated with "shaking palsy."

**Option C:** Arsenic poisoning can cause a range of symptoms, including gastrointestinal distress and skin lesions, but it is not typically associated with neurological symptoms such as "shaking palsy."

**Option D:** Strontium is a mineral that is not typically associated with neurological toxicity or symptoms such as "shaking palsy."

**Clinical Pearl / High-Yield Fact**
Mercury toxicity can be particularly insidious because it can cause a range of symptoms that may not be immediately apparent, including tremors, personality changes, and cognitive decline. It is essential to consider mercury exposure in patients with unexplained neurological symptoms.

**✓ Correct Answer: B. Mercury. Mercury poisoning can cause neurological symptoms including "shaking palsy".**