What is the full form of $SCP$?

Methylophilus methylotrophus is which type of organism?

The bacterium $Methylophilus$ $methylotrophus$,due to its high rate of biomass production and growth,is capable of producing $25$ tonnes of protein.

Blue-green algae like $Spirulina$ can be grown on which of the following?

Consider the following statements $(I-IV)$ and select the option containing the correct answer.
$I.$ The unicellular $Spirulina$ can produce large quantities of food rich in protein,minerals,and vitamins.
$II.$ Based on body weight,the microorganism $Methylophilus$ $methylotrophus$ can produce much more protein in a day than a cow.
$III.$ Common button mushrooms are a rich source of Vitamin-$C$.
$IV.$ $A$ variety of rice has been developed that is rich in calcium.

Which of the following is an algal source of $SCP$?