**Core Concept**
Tumour lysis syndrome (TLS) is a life-threatening condition that occurs when a large number of cancer cells die rapidly, releasing their contents into the bloodstream. This results in an accumulation of nucleic acids, potassium, phosphate, and lactate, leading to electrolyte imbalances and renal failure.

**Why the Correct Answer is Right**
TLS is often associated with the treatment of certain types of cancers, particularly those that are highly responsive to chemotherapy or radiation therapy. The rapid cell death caused by these treatments leads to the release of the aforementioned toxic substances into the bloodstream. In the context of TLS, the most common culprits are lymphomas and leukemias, particularly acute lymphoblastic leukemia (ALL) and diffuse large B-cell lymphoma (DLBCL).

**Why Each Wrong Option is Incorrect**
* **Option A:** This is not a correct association. While certain types of cancer may be associated with TLS, the treatment of these cancers is not the primary cause of TLS.
* **Option B:** This option is incorrect because TLS is not typically associated with the treatment of solid tumors, such as carcinomas or sarcomas.
* **Option C:** This option is incorrect because TLS is not typically associated with the treatment of infections, although certain infections can cause TLS as a secondary effect.

**Clinical Pearl / High-Yield Fact**
To prevent TLS, clinicians often use allopurinol to reduce uric acid production, and rasburicase to break down uric acid. Additionally, maintaining good hydration and using diuretics can help prevent renal failure.

**Correct Answer:** C.