Identify the correct sequence of stages taking place during Calvin cycle:

Calvin cycle can be described under three stages: carboxylation, reduction and regeneration.
Carboxylation – Carboxylation is the fixation of ${\mathrm{CO}}_2$ into a stable organic intermediate. Carboxylation is the most crucial step of the Calvin cycle where ${\mathrm{CO}}_2$ is utilised for the carboxylation of RuBP.
Reduction – These are a series of reactions that lead to the formation of glucose.
Regeneration – Regeneration of the ${\mathrm{CO}}_2$ acceptor molecule RuBP is crucial if the cycle is to continue uninterrupted.