Integumentary outgrowth present over the micropyle of castor is
A. Chalaza- The location where the nucellus attaches to the integuments, opposite the micropyle.
B. Caruncle- The caruncle is a structure present in the micropylar region of Euphorbiaceae seeds. This structure has the ecological function of promoting seed dispersal by ants (myrmecochory), but it is debated whether it also has an agronomical importance influencing seed germination.
C. Aril- An aril also called an arillus, is a specialized outgrowth from a seed that partly or completely covers the seed.
D. Wings- The testae of both monocots and dicots are often marked with patterns and textured markings, or have wings or tufts of hair.
So, the correct answer is
‘Caruncle’ .