Subject :Biology     Class : Class 6 
                                                                     Which set of substances is not used for making fibres?
A Silk, chemicals
B Yak hair, camel hair
C Husk, bones
D Flax, wool
 Which set of substances is not used for making fibres?
A Silk, chemicals
B Yak hair, camel hair
C Husk, bones
D Flax, wool