Welcome to Westonci.ca, where you can find answers to all your questions from a community of experienced professionals. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.

Expression of which of the following is responsible for controlling ventral patterning of the central nervous system?
a. Retinoic acid
b. Sonic hedgehog
c. Fibroblast growth factor
d. Homeobox genes