Exam 5V0-31.22 topic 1 question 48 discussion

During a VCF design workshop, the architect gathered the following customer requirements:
There must be two environments: PROD and DEV.
PROD and DEV should be administratively separated.
PROD will use two different hardware server types, and DEV will only use one hardware server type.
The VCF infrastructure design should be flexible and scalable as much as possible.
How many NSX local managers in total will be provisioned after deploying the full VCF infrastructure?