Correct Answer: C

Rationale: In this context, 'projected' is used to indicate an estimation or prediction of the duration of the treatment. Therefore, it aligns closest in meaning to 'estimated.' Choice A, 'Protruded,' means to extend beyond or above a surface, which does not fit the context of the sentence. Choice B, 'Guaranteed,' means to provide assurance, which is not the intended meaning in the sentence. Choice D, 'Alleged,' means to claim without proof, which is not the correct interpretation in this context.

Correct Answer: B

Rationale: The correct answer is B: A type of lipoprotein. LDL stands for Low-density lipoprotein, which is a type of lipoprotein that carries cholesterol through the bloodstream. LDL is often referred to as 'bad' cholesterol because high levels of LDL can lead to plaque buildup in the arteries, increasing the risk of heart disease and stroke. Choices A, C, and D are incorrect as they do not accurately describe the abbreviation LDL.

Correct Answer: C

Rationale: Precipitous is best defined as being swift, meaning sudden, rapid, or happening quickly. It is often used to describe a steep and very steep drop or rise. The word does not refer to being damp, gentle, or dull. 'Damp' means slightly wet, 'gentle' means mild or moderate, and 'dull' means lacking interest or excitement.

Correct Answer: C

Rationale: In this sentence, the word 'vent' means to allow the gases to escape or be emitted to the outside. 'Block' is incorrect because it means to obstruct or close off. 'Trade' is incorrect as it refers to the exchange of goods or services. 'Inhale' is incorrect as it means to breathe in, which is the opposite of venting gases out.

Correct Answer: B

Rationale: The correct term for the kneecap is patella. It is a small, flat bone that sits at the front of the knee joint and helps in the transmission of force between the thigh and lower leg while providing protection to the knee joint. 'Patina' refers to a green or brown film on the surface of bronze or similar metals, 'pastel' is a pale, soft shade or color, and 'pathogen' is a bacterium, virus, or other microorganism that can cause disease.