PHP Extensions “0” must be loaded Magento

While installing the Magentos 1.7.0.2 I got this error even I installed the php5-mysql and all dependency.
To solve the issue follow the given below steps.

Step 1 : Edit line no. 72 in app/code/core/Mage/Install/etc/config.xml and search keyword pdo_mysql

Note: It should be in extension tag

And write like this as given below

                    1
                

See the below given screeshot