Chemistry and physics principles assure us that material in the ground can produce many products at the surface.
The producer is in charge of what it sells. See previous comments of others concerning leases and DO’s. Leave the options blank and accept the DO subject to the terms of the underlying lease. You cannot be expected to know what the operator may produce. Your lease gives the operator the right to produce minerals as described specifically or in general from your asset and if produced and sold, the operator is obligated to share the revenue with you.