Yes, the extension option is equivalent to the extension of "Options Options". As the name implies, deferred option is to extend the time on the basis of the original option. An option is a right at some time or moment in the future. The seller of the option gets some benefits, but he has to bear the corresponding contractual obligations. The buyer of the option obtains this right at a certain cost.

The buyer of the expired option can choose the execution and waiver of the agreed rights. Deferred option is a contract clause added on the basis of the original option. Deferred option and option are understood separately. Deferred option is a continuation after the time agreed in the contract, and deferred option is an additional option contracts added on the basis of the original option. So it can be extended.