The Reading:

Bodhidharma said, "The time is coming, and why do you not tell me what each one of you has attained?"

Dofuku (Ta0-fu) one of the disciples, said: "According to my insight, the Tao operates neither depending upon letters nor separate from them."  Dharma said, "You have my skin."

Soji (Tsung-ch'ih) the nun, said, "According to my understanding, it is like Ananda's seeing the land of Akshobhya-Buddha: it is seen once and never seen twice."  Dharma said, "You have my flesh."

Doiku (Tao-yu) said, "The four elements are from teh first empty and the five aggregates (skandhas) are non-existent.  According to my view there is not one object which is said to be attainable."  Dharma said, "You have my bones."

Finally Yeka (Hui-k'o) came out, made his bow, and took his place.  Dharma then said, "You have my marrow."

-Transmission of the Lamp, trans D.T. Suzuki, Studies in Zen, p23

Discussion:

It may seem like Yeka's answer was easy to give.  If you think so, then you haven't stood before Bodhidharma.  If you think so, you have never answered the question.