El profesor se sorprenderá mucho al ver tu solución correcta😉
c⇔(c∧(¬a))⇔((a∨c)⇒a)
+---+---+--------+ | a | c | result | +===+===+========+ | 0 | 0 | 0 | +---+---+--------+ | 0 | 1 | 0 | +---+---+--------+ | 1 | 0 | 0 | +---+---+--------+ | 1 | 1 | 0 | +---+---+--------+