[CentOS] installing centOS on extended partition

Can CentOS be installed on an extended partition? System has the following
partitions:
OEM(reserved)-78MB(primary)
System-100MB(primary)
C-55GB(primary)
D-100GB(extended)
Can I divide D into 2 parts:70GB and 30GB and install CentOS in the 70GB
logical partition?
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