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Suman Lata from o.s.d.a.v public school kaithal haryana, kaithal

Subject :NSO Class : Class 8

The substances produced by micro-organisms which in low concentration are antagonistic to the growth of other micro-organisms are called

(A) Vaccines

(B) Antibiotics

(D) None of these.

Ans 1:

Rahul from St xavier public school , Samastipur

Class : Class 8

Antibiotics