Choose the miroorganisms that are involved in yoghurt production: i) Streptococcus thermophilus ii) Lactobacillus bulgaricus iii) E.coli iv) Vibrio

The correct options are i) Streptococcus thermophilus ii) Lactobacillus bulgaricus. These are the microorganisms that are involved in the yoghurt production. These are the bacterium breaks down the lactose sugar present in milk to lactic acid. This lactic acid converts milk to yogurt.