Which of the following compounds do not undergo aldol condensation?

Options are as follows:

1. a, b

2. b, d

3. b, c

4. c, d

 

Hint: Compound must have α hydrogen.

EXPLAINATION(2)- For an aldol condensation reaction, the molecule must contain alpha hydrogen. Compound b and d does not contain α hydrogen, thus, they will not show aldol condensation. 

Hence, the second option is correct.