**Core Concept**
Blanket consent is a specific type of consent obtained from a patient or their representative before undergoing a medical procedure. It is an essential concept in forensic medicine, particularly in cases where the patient may be incapacitated or unable to give consent. Blanket consent is often obtained at the time of admission, allowing medical professionals to perform emergency procedures without needing further consent.

**Why the Correct Answer is Right**
Blanket consent is typically obtained at the time of admission to ensure that patients or their representatives are aware of the potential risks and benefits associated with medical procedures. This type of consent is essential in emergency situations where patients may be unable to provide informed consent. By obtaining blanket consent at the time of admission, medical professionals can perform necessary procedures without delay, ensuring the patient's safety and well-being. In many jurisdictions, blanket consent is considered valid for a specified period, usually 24-48 hours, allowing medical professionals to provide necessary care without needing further consent.

**Why Each Wrong Option is Incorrect**
**Option A:** Blanket consent is not obtained when the patient comes to the doctor for treatment, as this is a more general type of consent that may not cover all potential procedures.
**Option B:** Oral consent during a procedure is not considered blanket consent, as it may not be informed or comprehensive.
**Option C:** Implied consent by gesture is not a valid form of blanket consent, as it may be ambiguous or unclear.

**Clinical Pearl / High-Yield Fact**
Remember that blanket consent is a specific type of consent that should be obtained at the time of admission, covering potential procedures that may be necessary during the patient's stay. This ensures that patients or their representatives are aware of the potential risks and benefits associated with medical procedures.

**✓ Correct Answer: D. At the time of admission to do any surgery**