Differentiate between short period and long period

The question is incomplete. The complete question is as follows:

Differentiate between a short period and long period production functions.

Difference between a short period and long period production functions is as follows:

Short period: During this period at least one of the factors of production is available in a fixed quantity. For example: Framers having fixed land for growing crops.

Long period: During this period all the factors of production are variable. So change in any variable can increase the production.

im pretty sure its b