Which of the following compounds would give a positive Tollens test? (Remember that the Tollens test involves

Question:

Which of the following compounds would give a positive Tollens test? (Remember that the Tollens test involves mild basic aqueous conditions.)
(a) CH3CH2CH2COCH3
(b) CH3CH2CH2CH2CHO
(c) CH3CH==CHCH==CHOH
(d) CH3CH2CH2CH2CH(OH)OCH3
(e) CH3CH2CH2CH2CH (OCH3)2
(f)