Egg Yolks

Riddle: Which is correct to say, "The yolk of the egg are white," or "The yolk of the egg is white?"

Answer: Neither, because egg yolks are yellow.

Source: https://www.riddles.com/index.php/197

Which is correct to say, "The yolk of the egg are white," or "The yolk of the egg is white?" — Egg Yolks by Anonymous v1.

Riddle: Which is correct to say, "The yolk of the egg are white," or "The yolk of the egg is white?" Answer: Neither, because egg yolks are yellow. — by Anonymous v2.