**Core Concept**
Secondary hemorrhage, also known as delayed hemorrhage, is a potentially life-threatening complication that can occur after tonsillectomy. It is defined as bleeding that occurs more than 24 hours after surgery.

**Why the Correct Answer is Right**
Secondary hemorrhage typically occurs between 5 to 14 days after tonsillectomy, although it can occur up to 3 weeks post-operatively. This delayed bleeding is often due to sloughing of the eschar (the scab formed on the wound surface), which exposes the underlying mucosa to the risk of bleeding. The risk factors for secondary hemorrhage include post-operative bleeding disorders, coagulopathy, and infection.

**Why Each Wrong Option is Incorrect**
**Option A:** 2 days - This is too early for secondary hemorrhage, as primary hemorrhage typically occurs within the first 24 hours after surgery.
**Option B:** 1 week - While this is closer to the correct timeframe, secondary hemorrhage is more commonly associated with a range of 5-14 days.
**Option C:** 3 months - This is far too late for secondary hemorrhage, which is a complication that occurs within the first few weeks after surgery.

**Clinical Pearl / High-Yield Fact**
The American Academy of Otolaryngology recommends that patients undergo a thorough examination and assessment for secondary hemorrhage between 5-14 days after tonsillectomy.

**Correct Answer:** C. 7-10 days