644 views
0 0 votes

Please log in or register to answer this question.

Position:
Show:

Related questions

0 0 votes
0 0 answers
215
215 views
Gate Fever asked Oct 13, 2018
215 views
FROM OPTIONS ONLY IT IS VERY EASY TO GUESS THAT IT IS OPTION C,BUT I WANT TO KNOW THE REASON WHY COMPLEMENT OF UNDECIDBLE LANGUAGE IS ALL POSSIBLE LANGUAGES