Correct Answer: Convivial

Solution : The correct option is the fourth option.

The word that means the same as the given word "genial" is "convivial."

Genial is an adjective that describes someone or something as friendly, warm, and pleasant. It often refers to a person's demeanour or atmosphere.

Convivial is an adjective that also describes a friendly, sociable, and pleasant atmosphere. It is often used to characterise social interactions or events where people are cheerful and amicable.

In this context, "convivial" is a synonym for "genial," because both words convey the idea of a friendly and pleasant atmosphere.

The meanings of the other options are as follows:

Tense: This is the opposite of "genial." It refers to a state of nervousness, strain, or uneasiness.

Lacuna: This refers to a gap or missing part, unrelated to the meaning of "genial."

Laconic: This means using few words, often being brief or concise, which is not the same as the friendly and warm connotation of "Genial."

Therefore, the correct synonym for genial is convivial.