In the given sequence, the position of the last O is moving backward from every term. XXXXOXO ⇒ O’s position 7‌th, XXXXOOX ⇒ O’s position 6‌th, XXXXOOX ⇒ O’s position 5‌th, XXXOXOX ⇒ O’s position 4‌th, XXOXXOX ⇒ O’s position 3‌rd