In John's Gospel, which disciple objected to Mary's expensive perfume?

Answer: Judas Iscariot

Judas Iscariot asked why it wasn't sold for 300 denarii for the poor, not because he cared for the poor, but because he was a thief.

“But one of His disciples, Judas Iscariot, who was going to betray Him, asked, “Why wasn’t this perfume sold for three hundred denarii and the money given to the poor?” Judas did not say this because he cared about the poor, but because he was a thief. As keeper of the money bag, he used to take from what was put into it.”— John 12:4-6 (BSB)