**Core Concept**
Cisplatin is a platinum-based chemotherapeutic agent used to treat various types of cancers, including testicular, ovarian, lung, and stomach cancers. It works by inducing DNA cross-links, thereby inhibiting DNA replication and transcription, ultimately leading to cell death. Cisplatin's mechanism of action is associated with several side effects due to its toxic effects on multiple organ systems.

**Why the Correct Answer is Right**
Pulmonary fibrosis is not a commonly associated side effect of cisplatin. While cisplatin can cause lung toxicity, it typically manifests as pneumonitis or pulmonary embolism rather than pulmonary fibrosis. The correct answer is **D. Pulmonary fibrosis** because this side effect is more commonly associated with other chemotherapeutic agents, such as bleomycin.

**Why Each Wrong Option is Incorrect**
**Option A:** Ototoxicity is a well-known side effect of cisplatin, which can cause damage to the inner ear, leading to hearing loss or tinnitus. Cisplatin's ototoxic effects are thought to be due to its ability to bind to and damage the hair cells in the cochlea.
**Option B:** Nephrotoxicity is also a significant side effect of cisplatin, which can cause acute kidney injury or chronic kidney disease. Cisplatin's nephrotoxic effects are thought to be due to its ability to cause oxidative stress and inflammation in the kidneys.
**Option C:** The "coasting effect" is a rare but potentially serious side effect of cisplatin, which can occur when the drug is discontinued. During this time, the patient may experience a worsening of symptoms, including renal dysfunction, due to the continued release of the drug from the body.

**Clinical Pearl / High-Yield Fact**
It is essential to note that cisplatin's side effects can be mitigated by administering diuretics, such as mannitol, to help reduce the risk of nephrotoxicity.

**✓ Correct Answer: D. Pulmonary fibrosis**