Which of the following features of Amazon RDS allows for better availability of databases? Choose the answer from the options given below.

Answer options:

A.VPC Peering
B.Multi-AZ
C.Read Replicas
D.Data encryption

Answer – B
The AWS Documentation mentions the following.
If you are looking to use replication to increase database availability while protecting your latest database updates against unplanned outages, consider running your DB instance as a Multi-AZ deployment. 
For more information on AWS RDS, please visit the FAQ Link:
https://aws.amazon.com/rds/faqs/