Given ellipse is x² + 4y² = 9.

⇒ x² + 4y² = 9

⇒

⇒

Comparing with the standard form

Here a²>b²

⇒ eccentricity(e) =

⇒

⇒

⇒

⇒

Length of the latus rectum is

Focus (±ae,0) =

Directrices are

Directrices are

∴ The correct options are B and D