SSC JE Mechanical Engineering 2017 Set 2 Paper

In the given sequence, the position of O is increasing in every position from the front to the back.
OXOXXXX ⇒ O’s place 1st and 3rd
XOXOXXX ⇒ O’s place 2nd and 4th
XXOXOXX ⇒ O’s place 3rd and 5th
XXXOXOX ⇒ O’s place 4th and 6th
XXXXOXO ⇒ O’s place 5th and 7th.