[sonya36]

The question and molecule are shown here.
I only see 5 prochirality centres:

2 where ketone groups are attached, because new substituents can be added to re and si faces of the sp2 carbon

other 3 where c are sp3 hybridized and attached to 2 hydrogens each

But 5 is not one of the choices in the question.. Where am I going wrong here?

[Dan]

I agree with the 5 you have identified, but I think there are 2 more.

Hint: Look for any sp² centres attached to 3 different groups.

[sonya36]

I agree with the 5 you have identified, but I think there are 2 more.

Hint: Look for any sp² centres attached to 3 different groups.

Do sp2 carbons at the double bond area count as prochiral centres? Isn't one of them attached to two hydrogens already?

[Dan]

Do sp2 carbons at the double bond area count as prochiral centres? Isn't one of them attached to two hydrogens already?

Yes, any sp² centres attached to 3 different groups.