Single Cell Protein $(SCP)$ is obtained through which process?

Which bacterium has the capacity to produce $25$ tonnes of protein due to its high rate of biomass production and growth?

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.

$A$ person who is allergic to pulses was advised to take a capsule of $Spirulina$ daily. Give the reasons for the advice.

Which alga is rich in protein?

Which microorganism produces 200 g of protein in a single day?