Don't eat it.
सेब लाल है ॥
Apples are either red or green.
Apples are not "black" unless it is Steve Jobs'.
how come sometimes you say kaali but fr apple its kala?
Kali is used for feminine object
Are there any clues why an apple is masculine? Is it because it has seeds?
Grammatical gender actually has nothing to do with physical characteristics. It's just a way of marking nouns. A noun that is masculine in one language may be feminine in another or neuter in a third language