Hi Bibin,
To use all BitLocker features, your computer must meet certain hardware and software requirements. The Dynamic disks are not supported by BitLocker. Dynamic data volumes will not be displayed in the Control Panel. Although the operating system volume will always be displayed in the Control Panel, regardless of whether it is a Dynamic disk, if it is a dynamic disk it is cannot be protected by BitLocker. For a list of supported disk configurations, see the article: What type of disk configurations are supported by BitLocker?
Converting dynamic disks to basic disks : If you have converted a basic disk into a dynamic disk, you cannot change the dynamic volumes back to partitions. Instead, you must move or back up your data, delete all dynamic volumes on the disk and then convert the disk. For more information, refer to this article: Change a dynamic disk back to a basic disk.
Important: Before you convert a Dynamic Disk to a Basic Disk, you should back up or move all the data on the disk to another volume.
Hope this is helpful. Please get back to us if you need any further assistance with Windows Operating System.