answerable

Short definition from Wiktionary

Adjective

1. 1
   Required to justify one's actions (to somebody); accountable, responsible.
2. 2
   Able to be answered.
3. 3
   Correspondent, in accordance; comparable (to).
4. 4
   Proportionate; commensurate in amount; suitable.
5. 5
   Of an argument: capable of being answered or refuted; admitting a satisfactory answer.