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If the distance from the directrix is greater than the distance from the focus then what is the value of eccentricity?

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If the distance from the directrix is greater than the distance from the focus then what is the value of eccentricity?

(a) Unity

(b) Less than one

(c) Greater than one

(d) Zero

The question was posed to me in exam.

Enquiry is from Basics of Conic Sections in portion Curves used in Engineering Practice of Engineering Drawing

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Correct answer is (b) Less than one

The best I can explain: Eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. Therefore, by definition the value of eccentricity is less than one hence the conic section is an ellipse.

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