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

Best Answer Explained in Below-:

The word "gullible" describes someone who is easily deceived or tricked, due to their tendency to believe what others tell them without sufficient skepticism. Among the options provided, "D) easily deceived" directly captures this essence.

Let's look at the other choices:

A) "foolish" implies a lack of wisdom or good judgment, but does not specifically denote the ease of being fooled or misled.

B) "willing to believe anyone" suggests a readiness to accept statements from others, which aligns closely with gullibility but does not highlight the aspect of deception inherent in the word "gullible."

C) "simple" refers to someone who is uncomplicated in nature, which may imply naivety, but again does not specifically address the notion of being easily deceived.

In contrast, "D) easily deceived" succinctly summarizes the core meaning of "gullible," emphasizing that such individuals are not just naive, but actively susceptible to being misled or tricked. This makes it the best synonym among the options given.