In the given question, the location of F is progressing gradually. Condition (1) ⇒ F EE F EE ⇒ The location of F is 1‌st and 4‌th. Condition (2) ⇒ E F EE F E ⇒ The location of Fis 2‌nd and 5‌th. Condition (3) ⇒ EE F EE F ⇒ The location of Fis 3‌rd and 6‌th. Like this Condition (4) ⇒ F EE F EE ⇒ The location of F is 4‌th and 1st. That is the correct answer.