The answer is "b"!

Cherubim, as described in Ezekiel, have 4 faces (human, lion, bull, and eagle), 4 wings, human hands, and hoofed feet. These angels have served as guardians of Eden, flanking God's throne, and figuratively described as the chariot of God.

Closely associated with God and His presence, God instructed that images of cherubim be made of gold at the two ends of the mercy seat on top of the Ark during its construction. And, in the construction of the inner most rooms of Solomon's Temple, large cherubs (up to 10 cubits in height) were carved and adorned the walls of the Holy of Holies (where the Ark was kept) and the Holy Place.