When micropyle, chalaza and hilum lie in a straight line, the ovule is said to be

Options

A. anatropous
B. orthotropous
C. amphitropous
D. campylotropous

Answer

B

Explanation

Orthotropous or atropous ovule is the most primitive and simplest type of ovule in angiosperms. It is erect (i.e., micropyle at upper end) and here micropyle, chalaza and funiculus lie in a same striaght line, e.g., families polygonaceae and Piperaceae.