Question

... his tears had an unusually pleasant taste in mother's presence and filled his soul with a peculiar

Answer 1

Answer: A. Yura's mother offers him loving consolation.

Explanation:

When his mother was present, Yura felt an unusually pleasant feeling when he cried. A feeling of serene sadness which is essentially consolation because it involves sadness that is being calmed and filled with peace.

Suffice to say, being with his mother gives Yuri a consolation that he cannot get from other activities such as laughing, playing or reading.