Question: An unknown compound is positive on the Tollen's test. When it is treated with I2 / KI and NaOH, a yellow solid identified as iodoform

An unknown compound is positive on the Tollen's test. When it is treated with I2 / KI and NaOH, a yellow solid identified as iodoform is obtained. The unknown compound is?

choose the best option:
a-Acetophenone
b-Acetone
c-Propanal
d- Ethanal

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