Microbiology
Selective media for the isolation of Shigella is

Salmonella-Shigella agar
Xylose lysine deoxycholate agar
Hektoen enteric agar
All of these

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Microbiology
Which statement is true about flavouring materials spices, garlic etc. added to Dill pickles?

They may improve texture of the pickle
They may be source of considerable numbers of undesirable micro-organisms and cause off-fermentations or spoilage of pickles
None of these
These markedly stimulate or inhibit the acid forming bacteria

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