# Aldehyde and ketone reactions

Reagents to carry out above conversion, P, Q, R respectively are:

(a) $$\ce{H2C=CH-CH2-Br}$$, $$(\ce{HO-})$$, $$[\ce{HO-}, Δ]$$, Wacker process.

(b) $$\ce{H2C=CH-CH2-Br(HO^-)}$$, Wacker process, $$\ce{HO-}$$, $$Δ$$.

(c) Wacker process, $$\ce{H2C=CH-CH2-Br(HO^-)}$$, $$\ce{HO-} (Δ)$$.

(d) Wacker process, $$\ce{HO-} (Δ)$$, $$\ce{H2C=CH-CH2-Br(HO^-)}$$.

Could someone please explain the R part of this reaction? I can't understand the five-membered cyclization step. Is it aldol condensation or there's something else?