Pick the appropriate choice about collision theory of reaction rates.

I) It explains the effect of temperature on rate of reaction
II) It assumes that the reactants must be in correct orientation to react.

III) It says rate depends upon the frequency at which reactants collide.

IV) The collisions having energy higher than the threshold value will give successful reactions.
 

Collision theory is a concept used to forecast the speeds of chemical reactions.

•  According to this, only a specific number of collisions between the right reactant particles and the right orientation lead to a detectable or noticeable change; these successful modifications are referred to as successful collisions. 
• The energy required for successful collisions, also known as activation energy, must be high enough at the point of impact to dissolve all existing bonds and create all new ones.
•  The reaction's byproducts are produced as a result. A higher reactant concentration results in more collisions, and thus more successful collisions. The average kinetic energy of the molecules in a solution rises as the temperature rises, increasing the number of collisions with sufficient energy.