The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to

The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to 

(a) 1 ionic bond and 3 covalent bonds (b) 1 ionic bond and 4 covalent bonds (c) 2 ionic bonds and 2 covalent bonds (d) 2 ionic bonds and 4 covalent bonds
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Answer :

The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to 1 ionic bond and 3 covalent bonds

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