Buttoning is a physiological disorder in

Answer: Option B

Buttoning is a physiological disorder in cauliflower.
This disorder of cauliflower is identified by the development of small curd or 'button' while the plants are small and consequently, the curd gets open.
This is caused due to the deficiency of nitrogen, by planting seedlings older than 6 weeks, or other factors like insufficient moisture supply, water logging, hot and dry weather, carelessness in proper and timely weeding and pest and disease attack.