None of them.

In the end, you decide that none of these girls are worth impressing. One by one they come over to meet you and you give them the minimum amount of attention needed. A few times your attitude threatens to start a problem but the women simply walk along and go to talk with some other sissy. An hour of miserable half-conversations latter and it's all done. You and a handful of boys remain in the room after the crowd has left with their newly owned males. Having filled out many ownership transfers, the head mistress has left the room as well, leaving your group with a half dozen orderlies.

Looking around, you can see that the other leftover boys are known rebellious types. You hadn't really thought of it too much but it seems that you have more in common with these boys than you previously thought. Disappointed orderlies gather you all up and lead you off down the hall. You're not really sure what awaits you but during the walk the boys start to gossip.

"Where are they taking us?" one whisper.
"I dunno." one says.
"Back to the dorm?" another guesses.
"Whatever it is, it's probably better than being owned by one of those girls." one says a bit too loud.

A loud slap sounds through the hallway as one of the boys is brought to his knees by a powerful slap from one of the orderlies. The boys are shocked, you included. You've seen orphans being spanked or left without food but you've never seen one hit across the face like that. The other orderlies don't seem to be phased one bit. You even see one nod in agreement as the assailant approaches her meek victim. Standing over the boy, she raises her hand, threatening another hit.

"How dare you speak about those women like that?" she says to the boy who looks to be teetering between anger and fear.
"Ungrateful males like you make me sick!" she shouts, grabbing the boy by the scruff of his dress and throwing him back into your group. The rest of the walk is silent. Unfortunately, it doesn't end back at the dorm. Instead, you're all led outside to the back of the Orphanage. Waiting for your group is a large carriage, two armed guardswomen, and the head mistress herself.

One of the guards calls out, approaching with manacles and chains in hand.
"Drop to your knees, hands behind your back."
All the boys look at one another and you can tell that they're unsure of what to do. This is bad, real bad.