The correct order of increasing bond length of C - H, C - O, C - C and C = C is

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C -- H < C - O < C - C < C = C

C- H < C = C < C - O < C- C

C -C < C =- O < C -O < C - H

C - O < C - H < C - C < C = C

answer is B.

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Detailed Solution

The C - H is the shortest due to small size of both atoms and large electronegativity difference. The double bonds are shorter than single bonds. Hence, C = C bond is shorter than C-O and C-C. Due to electronegativity difference between C and O, the C - O bond length is shorter than C-C bond. Hence, the correct order is
C-H < C = C < C-O < C-C

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