Three small noses

Once upon a time there were three little brains behind three small noses. One day the first little brain had a thought.
"Oh dear, my Mummy is on the phone and I am in the garden and I am bored. My nose is very interesting though. I wonder if it would be more interesting with a small stone stuck up it?"
And the little brain instructed a little hand to put a small stone up it. Fortunately, his Mummy noticed and managed to squeeze it out.

A few years later, a second little brain was enjoying the taste of some raisins when it wondered what it would be like to eat one through its nose.
"Oh dear," said the second little brain shortly afterwards, "I don't think that was such a good idea...."
Nor did the second little brain's Mummy and Daddy and they were just about to set off to casualty when the second little brain ran into the sofa and winded himself. "Look" cried the second little brain, "I've snorted it back out!" His parents were very relieved.

Time passed. Then yesterday a third little brain was sitting in the supermarket trolley chewing a nice healthy granary bread roll.
"Ah," mused the third little brain, "My nose feels very empty and here on my roll is a nice big grain that I think would fit very snugly up there." So the third little brain shoved the grain up her nose but was a bit perturbed when it wouldn't come back out again.
"Mummy," said the third little brain, "I've got bread up my nose."
"Nonsense dear," said her Mummy.
"But I do Mummy, I do," the third little brain began to wail. "Get it ooooout!"
So her Mummy found a tissue and instructed the third little brain to blow hard and they were both very thankful when it blew out onto the tissue.
"Phew." said her Mummy. "Don't do that again eh?"

Anyone care to guess which foreign object was inserted in the nose in the photo?
a) a small stone
b) a raisin, or
c) a grain from a bread roll