Correct Answer: Angry

Solution : The fourth option is correct.

The word placid means calm or peaceful. Among the options provided, angry is the antonym that best represents the opposite of placid .

So, in the context of the sentence about the cricketers having a placid conversation that caused controversy, changing placid to angry implies that the conversation was not calm or peaceful; instead, it was heated or agitated, leading to controversy.

The meanings of the other words are:

• Sardonic : This word refers to a mocking, often characterised by scornful humour or derision.
• Inappropriate : This term signifies something that is not suitable or proper for a particular situation.
• Informal : This word describes a relaxed, casual, or non-formal way of communicating or behaving.

Hence, the right answer is angry .