Correct Answer: Discusion

Solution : The correct choice is the third option.

The incorrectly spelt word in the given options is discusion. The correct spelling is discussion, which refers to a conversation or a debate between individuals or groups.

The meanings of other words are:

• Languish: This means to become weak, feeble, or suffer from being in an unpleasant situation for a prolonged period without making progress.
• Altitude: It means the measurement of something above sea level.
• Longitudinal: It pertains to the length or the longest dimension of something, especially the line between the poles on a globe.