Topic: Synonyms, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The word "delude" means to deceive someone into believing something that is not true or to mislead them in some way. When we look at the options provided, “deceive” (option D) directly aligns with this definition. To delude someone involves tricking them, often by creating a false impression or misrepresentation.

Examining the other options:

- **Demand (A)** refers to asking for something forcefully or requiring something, which does not relate to misleading or deceiving.
- **Permit (B)** means to allow or give consent for something to happen, again unrelated to the notion of deception.
- **Aggravate (C)** means to make a situation worse or more severe; it involves intensifying a problem rather than misleading someone.

Therefore, the synonym "deceive" accurately captures the essence of "delude," making it the correct choice. The process of deluding inherently incorporates elements of deception, which is why understanding this relationship is key to grasping the meaning of both terms.