English

The correct preposition to use with illnesses is 'with', so 'He is down with Malaria' is the correct phrase. Other options do not fit standard English usage in this context.

The word 'foible' means a minor weakness or flaw in someone's character. Its antonym is 'forte', which means a person's strong point or strength. Therefore, option C is correct.

The idiom "a pipe dream" refers to an unrealistic or impracticable plan or hope, something that is unlikely to happen. Therefore, option C is correct.

The word 'bureaucracy' is spelled correctly, while the other options contain misspellings. Therefore, option A is the correct choice.

A 'Heretic' is someone who holds beliefs or opinions that go against the established doctrines of a religion, thus acting against religion. The other options do not specifically mean acting against religion.

The phrase 'every now and then' means 'occasionally' or 'from time to time,' indicating something happens sometimes but not regularly or always.

The word 'foment' means to instigate or stir up, especially something negative like trouble or rebellion. 'Incite' is a direct synonym, meaning to provoke or encourage action, making option A correct.

An epitaph is a brief statement or summary commemorating a deceased person, often inscribed on a tombstone. The other options do not fit this definition.

The phrase "Be all ears" means to listen very attentively or with great interest. Option B correctly captures this meaning, while the other options do not.

Sapphire, Ruby, and Topaz are all precious stones used in jewelry, making option C the correct analogy. They are not fishes, and while some can be used as abrasives, the primary commonality is that they are precious stones.